Hi! Sorry it took me so long to respond, various real life stuff has really taken over my free time and energy, and I didn't want to half-ass this post, since it really caught my attention and it deserves a proper reply.
- EXALT Infiltrator: a straight up upgrade. The old one makes me feel embarrassed; yours is nicer, better, sexier and captures the original spirit. I'd use it on the spot. (Not sure which hair is best, but I like the no number and 2 best.)
- Red Dawn Ganger: very cool, but I think it's a bit too gangsta for the role. These guys are supposed to be boring and mundane everyday citizens, and all this bling and smoke give them too much character. But it's perfect for a mobster, I'd be happy to use it somewhere (maybe some new Osiron unit?).
- Dagon Follower: hmm, it's a big departure from the basic concept, so I'm a bit hesitant, but I dig it. I'd seriously consider it.
- Red Dawn Lad with a beard: looks pretty cool, but a bit too "ethnic" to represent a generic Red Dawn guy.
- Red Dawn Lad with a kevlar vest: I'm not that sadistic.
This is a low level unit, and I would have to bump its armour to something like 20. (Yes, low level EXALT units have bulletproof vests, but they're overall weaker than Red Dawn people.)
- EXALT Cleaner: Very cool concept, I would use if if I ever need a new unit. But maybe add some hair to make him look less like the MiB pilot. Perhaps they could be added to some rare-ish slot, we'll see.
- Chief Engineer: good sprite, but he looks way too much like a pilot or a riot officer. Our guy is primarily a lab technician.
So, to sum up: there are some very neat upgrades which I would like to use if you are OK with it. Others are interesting, but would be more appropriate for new units, if I ever make them. But all are very nice sprites.