Well, I'm only a noobodder over at SWK and this is the first I've looked into BFII modding, but from a creative standpoint I'd have to say I like the style (I'm assuming those are for the humans).
I don't know if you can do faces, but I'd suggest a few (at least for land combat) with no helmet ala gears of war. The reason for the suggestion is that while all your helmets are excellent, they seem a little too similar, but in order from L to R I'd say that 2 and 3 are the best, then 1, then 5, and last 4 it just seems a little tall (maybe if you added something on the side.
I really can't do much, but if you need any creative advice the PMs always open
I wish you luck and mucho blessings
err, what kinds of gameplay types are we talking about here, that's one thing I'm already feeling a need for?
edit: I just realized, what you need is a female model (that's how you get downloads
) for a commando, sniper, or some kind of stealth class (maybe with similar plating, but lighter clothing underneath, with some sort of nightvision glasses instead of a helmet)
Another thing to consider would be to make a slight resize for larger heavy weapon specialists.
I hope that helps more than hurts