[Martijn]

To clarify it some more. For Eden and Frodo we almost had it were we wanted that it could share the same addon until we found out that versioning was a bit of a mess for both our internal addons, dependencies and 3rd party version.
That's the reason we decided that Frodo and Eden should be split up and that is just because of the addon.xml
Ofcourse if you used HTTP API you would still have to create a separate version.
For Frodo and it's follow up we have high hopes nothing will change for addons (except some additional functions). So for the majority of addons nothing will change unless they want to use some new functions.