Microsoft Office Store dont allow to publish SharePoint App with Full-permission, but there is the need from Site Administrators to extend the Out of the box functionalities such us
SP.UserCustomAction object (sp.js)
http://msdn.microsoft.com/en-us/library/office/jj245920.aspx to the Site Administrators be able to add custom Actions/Ribbons and Script to their business in the Host Web Site.
If this option can be done from the App Web to Host Web will avoid SharePoint Solution instalation "WSP" in Farms, the complexity of XML will be reduced and eficiency will increase (hours spent by Dev can be reduce in minutes)
App example: http://aaclage.blogspot.ch/2014/06/sharepoint-app-processlynx-custom.html

It is possible to add some type of rule to allow this specific object in scope (Web) to be publish in the Office Store?

Developing my first App for Office (specifically Excel) was an experience I found to be unnecessarily difficult. The Trusted App Catalogs user interface in Excel:

File -> Options -> Trust Center -> Trust Center Settings... -> Trusted App Catalogs

Is a giant mess. There's no browse button - just a field to punch in a string that has to be formatted a specific way and only allows network shares and SharePoint remote servers. First off, I was expecting to see a checkbox to "Allow manifest files from untrusted locations" that would then open up a way to select a XML file via the standard Windows "File Open..." dialog within Apps for Office itself. The File Open... dialog handles all sorts of scenarios that are useful and flexible (e.g. it can download remote files via a URL). Excel shouldn't care where the XML file comes from after such a checkbox is checked. Then, if you really truly wanted to define an entire catalog, have a XML index file option where the XML file points at a bunch of other XML files. And while you are at it, add a button that allows a user to export their catalog to an index XML file in the appropriate format (i.e. allow a developer or other qualified IT employee at a company to construct the catalog and then export it). This allows you to get rid of the entire Trusted App Catalogs dialog altogether and have a sane Apps for Office dialog that actually makes sense. The way it is built now also basically stops local computer development of new apps (WTF?) unless the developer knows Windows intimately and can figure out the '\\.\C:\path\to\manifest\' hack that makes a local drive *LOOK* like a network share to the clearly poorly written code behind that dialog. When there are grammatically incorrect strings being emitted, you know the code is crap. Again, the dialog should not exist at all.

Having to restart Excel after making each change to the Trusted App Catalog dialog should have been the first indicator that perhaps the Office Platform team was going about Apps for Office all wrong.

I'm certain that if Bill Gates still worked at Microsoft and sat in on the meeting regarding this non-feature of the Office suite, the F-word counter would surpass whatever the existing record is. This is alpha-quality (at best). Go back and redo.

Moving from VSTO, etc. to Apps for Office/Office Add-Ins customers have expressed concern that if I (the developer) deploy an app and they start using the app that they will no longer have control over when they update to the latest version of the app.

For instance say I deploy version 1 to the Office Store and the companies A and B install the add-in for all their employees. When I'm ready to deploy version 2, company A might be ready while company B might not. I'd like a way for companies (and ideally individuals as well) to be able to say the for a particular app X, the company only wants to allow the deployment of version 1 with some signature over the contents. This could be done easily if there was an app type that required the entire app (HTML, JS, CSS, images ,etc.) to be packaged into a single ZIP and clients would download the ZIP and run the contents from the client device, instead of from a remote server.

We keep getting reports and complaints from users that buy our apps but seem to be locked in trial mode. Receiving 1/2 reports a day. We checked that we are receiving trial tokens in the app, but users confirm that they bought the apps. Some are able to reset somehow, but most can't.

This error is also described here (see first review by Rod):
http://office.microsoft.com/en-gb/store/mini-calendar-and-date-picker-WA102957665.aspx

Other recent feedback from user:

"I tried all the usual suspects. Reloaded excel. Refreshed apps in excel. Attempted to repurchase through excel to see if it would kick in. Restarted the computer."

"If my memory is correct, I believe the yellow trial warning box that drops from the top of the screen that prompts you to purchase (which I believe is queued when you try to load data instead of just watching the demo) eventually caught on itself and the 'buy' button turned into a 'refresh' button (or something very similar to that) and where it said '...you are on a trial, click to buy...' it changed to 'you may have purchased this, click to refresh'. As soon as I did that it worked, I think the problem is that the 'you may have purchased this, click to refresh' button isn't appearing on command as I had to try the things I mentioned to get it to kick through (and who knows if what I did did anything, or if it eventually fixed itself). Hope that is clear."

Already opened an issue with office apps support team, but now new information yet.

Can only imagine annoying and demotivating this should be to Office users.

Rui

Right now I get 10's to 100's of app results for a particular category. I'd like to be able to sort those results by 'most popular' (most added?), 'highest rated', cost (free/not free), etc. It's just a shimorgizboard of stuff right now, and makes me dread finding an app or building an app. I want users to find my app because it's the best (i.e. ratings), but they cannot do that with the current interface functionality. Right now my app would just be lost in the sea of other app's, so where's the developer incentive to build an awesome, low-cost app?