I definitely would
not like it if A6 pro users would be barred from upgrading to A7 pro!!!
It would mean that I can't upgrade to A7 pro anymore for EUR 234.45, which to be honest is a great deal. I'm still working on A6 projects and am waiting for certain bugs to be fixed, but eventually I will upgrade.
i would be mainly interested in a6 pro's file packaging system, that's why i see no need for me to update to a7 as all i wish to do in gs works well in a6 (yet).
If that's really the only thing you are looking for, then I'd suggest you to look into Lion_TS's tools. They aren't as expensive as A6 or A7 pro.