Don't you mean JK2? JA didn't mess with the damages of stuff, but JK2 did (a lot!). JA's problem was the popularity of admin mods (which also affected JK2), but I'm talking strictly about official patches here.
Well in JA everyone accused
every weapon that they lost to as having it's damages changed. Yes... the days of annoyance those were.
Yeah the idea of classes wouldn't be good for reasons stated by shok. It'd be like Battlefront but with all the weapons severly messed up to where people would only be one class.