It's exactly what it looks like. A good idea that's been hammered and melded and ♥♥♥♥♥♥♥ized by the publisher to resemble the games that were all the rage in 2007. The cover based third person shooter. The modern military shooter. More zombies yay.
The thing is the concept alone was enough to bring this on a slightly higher level. It's a ♥♥♥♥ port, so that brings it back down.
Still, if you play and enjoy warframe, this should shed some light on quite a few things. After all, Warframe is the game Digital Extremes were trying to make when they made this one. I personally LOVE warframe, so seeing little recognizable things here and there keep me playing. It's--It's kinda like the videogame equivalent of Agents of Shield. It's the content you go to the movies for, but filered through layers upon layers of bureaucracy and rushed out the door... But the chunks of the cool stuff the creators wanted to create make the whole thing a bit more special.
What's the moral of the story? Publishers ruin everything.
tl;dr: If you like Warframe, play it. If you like Gears of War, play it. If you have a soft spot for the early last gen titles of 2007, which was arguably the golden year of that gen, give this a shot. If you're not tied to any of these, this game will do absolutely nothing for you.