Please do not remove the users ability to select firmwares.
In the last year or so firmware updates have had tremendous impacts on the unit (IMHO) - and there is nothing worse then doing an update, checking your patches, getting to a gig and realizing, 'oh boy, I have a LOT of tweaking to do.' It's happened to me a lot - enough that I stopped doing firmware updates because I couldn't keep up with re-adjusting patches so often. So to be at a gig and just flip back to the previous version is HUGE for me personally. I actually ended up duplicating my sounds in 2 banks so when I did a firmware update I could make changes to one and then if I got myself into trouble I could revert back to an old firmware and go back to the old bank - all at the gig in the space of a few seconds.
When I finally upgraded to 10.x months ago I tested everything but something was wacky and every time I stepped on a patch it would lock my unit. I didn't have time to fuck with it so I just reverted to 9 and got thru the night. I eventually reset everything I could waited till the next update, installed it and it fixed it. But being able to revert is huge. The Axe is a challenge sometimes because even tho so many of the updates have dramatically enhanced the product and sound, there has been parameters added or moved and with the big change from 9 to 10 it has required me to basically reprogram every patches AMP settings practically from scratch. So I like being able to revert back Firmwares. If I couldn't I'd never gig on a x.0 release ever again. Too scary.