I'll start off.
I think this game would be perfect with just a few changes.
Firstly, I think everyone should have slightly more base health, like 1.1x or something around that. I think this would reduce the desire for auto armor.
Secondly, Auto Armor should have an activation delay of about 100ms. The average human has a reaction time of about 220 ms, so this would still provide an advantage to the AA user. However it would still reward users who activate armor ahead of time. Additionally multiple levels could be added, for example, level 1 = 200ms , level 2 = 150ms, and level 3 = 100ms delay.
Thirdly, the jackal should have a faster damage drop-off, it should be inferior to marshal at range.
Lastly, hip fire should not have such a large movement penalty across the board. The hip fire cross-hairs also flare too wide for accurate hip fire shooting.
Those are my opinions, please use this thread to post your own suggestions as well.