Clumsy gunplay and cover? You'd have to be the clumsy one not to cope with it, it's so simple. Seriously? Right click and move against cover, space to jump gaps, movement keys to pop out.
Is that clumsy to you? Mreh I honestly can't see it being too different from splinter cell systems.
If I wanted to play like that I woudn't be posting in the PC Games section of this forum.