Support wildcards for AppDomains in Office add-in manifests to support sub domains for example <AppDomain>https://*.acme.com</AppDomain>

The following list of events found on the client version of Word and Excel would aid in development of apps that work the same as current client addin apps work.

Excel Open Event
Excel Close Event
Excel BeforeClose Event
Workbook activate event

Word Open Event
Word Close Event
Word beforeClose event
Document activate event

1) For the calendars, I would need a property similar to Event.WebLink in order to be able to access the calendar from the browser

2) If possible, when opening the calendar in the browser, I would need to provide the calendar view (day/week/month) and the date.

I'd like to see the ability to register ribbon items (tabs and their children) dynamically on the client-side via my app or some tenant scoped javascript that I can register (needs to work with SharePoint Online and should not block submittal to the store). Right now the only way to register a ribbon item of any sort is to do so during the app installation which doesn’t allow us to extend the ribbon over time (either with our own service adding items or by allowing the user to add their own items via an app or whatever).

Right now, an app makes changes to the sheet, there's no way for the user to undo those changes (or their previous changes).

Is there a reason why you would not provide a common base for the two API's?
The Ewa namespace offers a lot of functionality requested in many ideas related to the Offie 2013 API - it seems you already have the code and the interface in the Ewa namespace ?