Did you even play this game? "Trying to play this game as a shooter?" Just what do you think the AP missions, which form 90% of the game, are?
Depending on your style of play, the vast majority of this game is a cover-based 3rd person shooter, or a 3rd-person sneaker a la the earlier Splinter Cells, with role-playing heavy conversations IN BETWEEN THE MISSIONS. The missions themselves are almost pure action, with the occasional conversation thrown into the major story missions, but not the side ones. Aside from choosing whether you'll sneak or not, and use lethal or non-lethal force or not, the biggest choices you make are whether you'll use a zip-line to get over a fence, or sneak into a shack to hack the gate computer instead.
None of this actually makes AP a bad game, but spare me your fanboy BS. This is an action game with role-playing elements, so naturally, people are going to focus on the action.