@ k0jak: As several people pointed out if you lower the nex damage its also harder to take down stacked people with it. I think we need to play around with the rot/regen values so that people do not get so highly stacked and then we can adjust the nexgun too.
The current armors fit nicely into the health system. I'm not sure if different armor types would work so well especialy as you can pickup as many as you want. In most other games you can't pickup the 'weaker' armor once you have the stronger ones so that your opponent might get some too. This would change the whole thing in nexuiz.
Hmm you could jump over items in quake3 too and as in nexuiz there is currently only a marginal difference between jumping and running so i think its not that big a problem.