Just did a run through your level. I'm affraid the only thing I can say that is really good is the music...and I normally never play with music on
Optimization is the most important issue: throw out all the meshes if you have to, but make sure your framerates don't drop just by just walking around. It's too wide and open than a good level has (in general). Scale the whole thing down so you can reach everywhere faster.
(yes, I know T2A mentioned this earlier: I totally agree with him on this)
Connectivity is also underused in your map: I don't know why the jump pad is on a lower level than the adjacent floor, but it only hinders everyone. Get it on the same level, plz. The round, yellow platform from the screenie can't be climbed from below (well...not easy, that is). why not?
That alternative route to the 100Armor is too hard to be used; either make it a ladder from the bottom or think out another way to connect this.
...And then there is item placement. To me, it seems like the items and weapons are just dropped somewhere randomly. I really suggest you put the damage amp on the 100 armor position, and think out a good spot for the 100 shield: somewhere easy reachable yet hard to control. Maybe lower the 50 shield platform (so it can be reached both from above and below) and put it over there. Or get rid of it entirely...
Then the weapons: put the lightning gun on a better lookout spot (eg rocket launcher spot), get the flak cannon in a narrower place (minigun spot) and the minigun ...ehm...on the double damage spot? Good DM maps contain all normal weapons, so give the link gun, bio rifle and shock rifle (espec. shock rifle) a good spot as well.
Ammo usage isn't enough: you should at least provide 2 ammo vials for each weapon, and don't be affraid to put them somewhere 'in the area' of the weapon: it provides better flow for free
Health is harder to predict...it's too low as it is, but just changing the scale puts health closer by. Oh, and 4 adrenaline for your entire map? Seriously...players who don't like adrenaline play with the 'no adrenaline' mutator anyway, so there's no need to punish those who play with the stuff
That's about it...Alter what needs to be altered, and bring on beta2