I haven't played this latest version yet, but I remember the previous version had some slowdown problems and might exit to home screen occasionally. But I am on stock ROM without any root, or overclocking.
I think these games are becoming overbloated as they add new updates...
Also, beware there was a bug in previous version so that you could not finish one mission, which made the game un-completable. I don't know if they removed it.
The game looks very nice and is a unique experience in its genre, but at the same time I absolutely hated the free to play model, it's atrocious. You won't be able to defeat enemies later without having some very strong weapons. I never played it in multiplayer, so cannot comment on that.