To many so called Splinter Cell fans bitch for no reason. Lets look at this for a sec. If you really are an assasin who is the best trained in the world. You are gonna be quick, quiet and decisive. Look at Bourne. Finally a film that showed just how lethal a man trained is.
For to long games like MGS or Splinter Cell have had awkward controls, the character fumbling around, slow, and taking 1 person out at a time or else you get wasted. That is the worst rendition of showing an assasin Ive ever seen.
Conviction is the first time a game makes you feel like an assasin. It got it right. And there is plenty of stealth skill involved.