Gamers (yes, even console gamers) are more sophisticated than publishers will ever give them credit for. Games that are more complicated don't need to be simplified. In fact, evidence is suggesting that over-simplification turns gamers off more than complexity does (Dragon Age Origins outsold the sequel by a fair margin as an example). A game system only needs simplification if it is over complicated. Splinter Cell has never been over complicated and needs no simplification for its appeal.
“The greatness of a nation and its moral progress can be judged by the way its animals are treated.” - Mahatma Gandhi