Adrian Meredith true, my priority is to make sure this is not going to be a nightmare for users to upgrade to.
Still, it would be very handy for us to be able to pave roads, so that if we have to break a specific API we can plan ahead to not have to break it twice.

If any of you has suggestions or special wishes, please open new issues; or if you have an idea but no well defined requirement you're welcome to comment right here or on the mailing list.