I have to say I did not play Alpha protocol (Isen't that a shooter? Not my thing to be honest...)
I tried to play "mass effect" but the storyline was too boring the shooter elements a pain so I stopped at the first part.
Alpha Protocol is a weird game... It can be a jackass shooter or complete stealth and gadgets game.
The story is as interesting as you are good at knowing what is going on and then having more information to have even more information.
The Espionnage RPG is not a bad way to describe it in fact, you are the one that have to understand how to make the most out of your espionnage tasks.
There is still some weird bug like 1 guard out of 30 that stop moving for no reason but beside that, I haven't encounter any other bug for now in 10 hours of play.