Toojays..
I think what you are doing is brilliant.
Anything that doesn't deal with scratch is grand in my books.
My only prob. is ...I'm a carver/ painter/ graphic artist ...so my brain is more geared to a graphical interface than text..
Whatever you can come up with to integrate as many goodies for jessie ...the better. Really truly...
(As an aside; If only there was someone doing development on the 770 ...it would make things easier for me..)

At present I have your fabulous work here installed and running on (one of my) LMDE2Betsy x64 Mate distros I'm using ..
I was going to have simply 1 distro with everything for the 770, 8x0, and 900 ..but it is just too much for a live distributable iso.
So I've got 3 separate Betsy's running with devel. enviros in varying states (so far)
And I am looking into other methods as well of running without scratch...
I'd prefer to have scratchless development if possible for us all...
consequently I have done some digging..because I remembered seeing something very specific..after hunting..found this:
http://rbelem.info/2010/01/14/maemo-...ut-scratchbox/
haven't tried it yet for fremantle..it has been 5 years since this post....hopefully it ends up being snarl-free.
If it is feasible to adapt instructions to diablo and bora (for 770 hacker edition 2007) then this would be a huge headache gone.

Anyway ..tell me what you think..regarding all the muddle I've mentioned above.
If you aren't interested in doing anymore (now or in the future) such work as you've done here ..cause you have had enough..just let me know and I'll make sure not to hold back any live distributable iso's waiting for more goodies from you to pack it with...