A lot of others are stuck on what we looked like in Firefall but this isn't Firefall.
No it is the "spiritual successor" to Firefall. I wasn't going to bother with Firefall comparisons but sure why not...
Now mind you this is my own personal opinion, I can't speak for others. One of the things that really made Firefall so cool was how iconic the frames were. Everything was fairly basic and it was obvious that while some of it was stylistic there was still a use for all of the parts involved. No frills, easy on the eyes and easy to recognize.
EDIT: Ok except for the poor bastion...
My two favorite frames were the Dragonfly and Nighhawk. At least when I played FF the frames were both basically bodysuits with some attachments, This made sense because both frames were meant to be quick and agile and they definately had that look. Sure the Nighhawk had some fin looking things coming out the back but it was simply and seemed to have something to do with being part of the stealth unit that was part of the bread and butter of a Nighhawk. Same thing with The dragonfly, it had two "wings" on the back with biocontainers that pumped in and out a bit. A little more busy than the nighhawk but again the dragonfly was constantly pumping out bio stuff to use in abilities and weapons. So again the parts of the frame were minimal and made logical sense in their aesthetic purpose.
The omniframe concept art looks badass as I have said before, but that's actually a little bit of the problem. It's busy, in that there are tons and tons of details and parts and flair and flanges and do-hickies that don't really look like they serve any useful purpose other than to *look* badass. I mean look at the feet, it almost looks like it has Hermes wings on its feet. Do those really serve a real purpose? Sure you could come up with some technobabble to explain it away but I think everyone realizes that no it was just to be stylistic so you are not going to get very far there.
Lets not get into the part where if you remove the human from the machine it looks like it would snap in half, or the fact that it appears you are not going to have any knees so walking is going to be realistically awkward (try walking without bending your knees). Or the fact that those wings are massive and yet um, have no aerodynamics whatsoever.
So to compare; Firefall's iconic, svelte, functional vs. Omniframe's busy, confusing, unrealistic
Now again, this isn't something I find terribly discouraging. After all this is simply a first pass look on what the omniframe might look like. I highly doubt the end result will be this picture as presented, but it still makes me want to know the thought process going on in Mark's head.
For example: Were the majority of the NPC's in Firefall all wearing full Battleframes? Were all main characters all wearing Battleframes?
Were any of these characters used as promotional material?