I gave it a proper spin last night. It's an entertaining game that has a reasonable amount of polish. My main issues with it were that:
a) It has no depth at all; it's too simple. I think I'd get bored of this game quite quickly as I'm already beginning to feel like I've seen all it has to offer in a coupe of hours of gameplay.
b) The game modes don't work very well, except for the deathmatch spinoff where you have to pick up the vial to score/deny points for the kill. This lets down the game a lot, because if the base rules don't work, the game doesn't work.
c) Balance is fucked due to the weapon system and made worse by the free to play system (YAY, PAY TO WIN). I'm level 2, played against a level 6 player - we weren't evenly matched. He explained how he was better equipped in the lobby between games: The guy had a recharging shield giving him a massive advantage over me in terms of hit points and had pumped all his earned currency into a rifle, putting it all into damage and a spooling mechanism. He'd bought a bloot booster but not an XP booster, so even though he was level 6, he had the kind of equipment that I wouldn't earn as a free player until level 12. Result? He has more hitpoints, which regenerate over time, higher rate of fire, and a each shot does quite a bit more damage as mine :/