First some feature suggestions
Allow Guilds/Clans This was one of coolest features of halo 2, and I can't for the life of me figure out why other games haven't done this. In halo 2 you could create a Clan with a very simple in game interface, you pick a name and invite people. It maxed at 100 members. You could give clan admin to up to 3 other people so they could invite/kick people. The reason this was so wonderful was because it created strong communities, and in a 5v5 it's very nice to be able to fill your team with people from your own group. A simple 3 or 4 letter tag to identify your group in lobbies as well. It also created great rivalries, and allowed a group to build a solid reputation. Also it was a great way to meet people of similar maturity and skill, who aren't already on your friends list.
Allow some way to show what character you main as, both in lobbies and your friend list (and clan list if you sexy devs add it that feature.) This would really help out when you're looking for an experienced sage, or omen to round out your team.
Now some balance suggestions
The price for full armor is a little nuts, 1000 to have 'full' health is a little steep in my opinion. It's bad enough a winning team is going to have more firepower, but them having more health and firepower for multiple rounds feels a bit oppressive. It really makes the 1st round MUCH more important than the next 2 or 3 after it.
The operator is a bit overpowered, maybe just taking 10 or 20 damage off the body shots would fix this. Snipers should always be aiming for heads!
In general most weapons are too expensive, especially the rifles.
There are too many mechanics that support camping. Abilities aside, the strong bullet slows on top of huge movement aim bloom is far too rewarding and advantageous to people who just sit there.
Now some advice to players
-If like me you struggle with the random bullet bloom, master the guardian (single shot rifle). It's much more accurate after the first shot than fully automatic weapons and headshots are greatly rewarded.
-Try to work in pairs, everything is easier with a buddy!
-Don't try to strafe shot with a sniper, you won't hit anything! After years of playing other FPS games I got in the habit of using my strafe to line up shots, break that habit now, it doesn't work in this game!
That is all, have a nice day!