Improvable Coop mode

I had an action adventure for PS3 searched with whom I can play with my wife for two (yes, my wife makes at such games with -D). Namely, each other and not against each other.
Therefore, the co-op mode was important. However, this is disappointing:
1) which you want to play to 2. You can specify only chapter-start. Pauses the game one session mittendrinn from the Chapter resist must be played from the beginning next time. The find out had ever lasted ne good half hour. And that may well be something more, you know not wieveil Chapter is left.
2) The split screen is horizontal, vertical would be better. You sit not one above the other but side by side.
3) provide Some are a little too difficult for beginners (ok, my wife makes with, but does not mean that they are not yet going rather buy shoes: -D). So if a job is too difficult, one can overcome this, the other does not, then it can take hours in advance. Therefore would be a switch, sometimes alone time as a couple, better what we are contrary to 1). It is supposed to not only make fun those who know by heart every game, and casual players are to get along.
In the sense ...