*Shrug* The game focus is RM, not DM. We don't even know if DM is in AoM. If it is, I can't even imagine how favour would be remotely balance-able.
1. As far as I know, myth techs associated with gods and deities are just like normal techs, only unique to that god choice, and probably researched at the temple.
2. Assumedly in DM you start off with 4 GP's. ES hasn't said how god selection is going to work in post age 1 starts, though. It's not one GP per age, it's one GP for every god you have in your pantheon, and every age gives you a new god, for a total of 4 in Mythic. Kinda like in AoK if you start in Post Imp, you don't just get Imperial Age techs, you get those from every age before you. ES mightn't even put a Post Imp equivalent setting in.
TheShædøwDåwn
If you're like me, then it's possible you're a clone generated from my stolen DNA. I suggest you turn yourself in for destruction immediately.