...and then you'll have to buy more expensive dies and go through the fireforming process. Give up a little to get a little...it's all about certain compromises.
I'm guessing better case life and a marginal gain in velocity.
Yup, Yup.
Maybe lower ES, as well.
But there are plenty of shooters who shoot very tight shooting ammo, while fire forming. Then once it's formed they know they'll have a velocity gain, and I would re-work a load using formed brass. So if it were me, I'd decide just how much brass do I want to have for the rifle (200 pieces is my personal minimum for each rifle). Start with brand new, high quality, regular .30-06 brass. Shoot all of it once, then work up a new load with fire-formed A.I. brass.
It would be an interesting cartridge for sure, you should do it!