I like to play stealthy and DONT like going forwards unless ive killed everyone how i want to...... this is a valid play style that is ruined by the checkpoint system.
A) I die,wasting 10-15 of time spent stalking and killing
B) even more annoying accidentally go over a checkpoint and to restart from where i want i need to quit to the main menu and take a guess at which checkpoint save to load.
There simply is no excuse for this. SORT IT