As to balance, what needs fixing IMO is
- Rage burst, because at the moment it’s basically an exploit. See this thread So... Rage Burst can no longer cover multiple targets
- Stealth, because it can also be easily exploited see this thread Let's fix stealth!
- Melee and berserker, because at the moment melee is so useless that the only viable berseker builds are “meta” in the extreme. See this thread Berserkers and melee need fixing
- Mindcrush, because it has 0 AP cost and a team of heavy/priests with jetpacks are reported to be basically unstoppable. Priest weapon exploit (this game just become much easier)
BTW, though I am all for improving the game, I do think it is very special and more often than not it has turned me towards its way of thinking. I find myself loving certain things that I hated on first sight.