I realize that every RTS I bought, it was initially because there was something cool about the unit design and I wanted to try them out. Grey Goo (who doesn't want to try the Goo?), Starcraft 1 and 2 (just moving hydralisks around is joy in itself - the game even devotes a significant chunk of its UI for animated portraits that serve no purpose other than to make you care about the units), SupCom, etc. Every RTS except AotS; that one I bought because it kinda looked like SupCom and SupCom has the most exciting and ambitious units I've ever seen. I was mislead.
If there's one comment that even the positive reviews seem to agree on it's that the artwork lacks soul and personality. The sound design is particularly appalling; I thought I had seen the worst with SoaSE where each race is voiced by a single actor with cheesy effects (SoaSE had redeeming qualities like great UI and visuals in general), but here it's like I was hired to do the sounds using items around the house, Audacity and a microphone, and I can't do sound design.
I've mentioned it during the beta but I'm very disappointed to see it in the released game: all units are the same more or less medium-sized platform with some random turrets and lasers on it, floating above ground for no other apparent reason than to save budget on animations, making them feel weightless and disconnected from the battlefield. There doesn't seem to be any physical justification for their appearance or behavior, or why anyone would design war machines like this. It seems like the game has very talented engine programmers but very little artistic vision. The amazingly utilitarian campaign also exemplifies this (and really, reviews wouldn't have complained half as much about the campaign if there had been none whatsoever, as we saw for SoaSE.).
Also, I don't what is it about the lighting but everything seems to be made out of plastic. This really reinforces the impression of looking at lightweight toys.
The game unfortunately steals some of SupCom's shortcomings rather than its achievements: unresponsive controls, poor-looking UI (at launch - SupCom was much improved later) and bland, low-resolution environments.
That's not to say the game lacks strategic depth or cannot be fun in multiplayer, which I haven't evaluated; but I am not enticed to evaluate it because nothing entices me about the artwork. It bores me. And as much as the game is likely to be improved in future patches and DLC, it's unlikely to have any significant change in artistic direction. Which is ultimately why I'm disappointed with this game.