I have only been playing for a few days, but I have played Act 1 and 2 of DoS:II, which had the same problem.
The auto-saving function saves too infrequently. If I die, and I have to go back 3 fights, and 2 hours of gameplay, that is very frustrating.
I suggest it auto saves whenever you long rest, at the very least, if not whenever you short rest.
Hitting F5 occasionally for a quicksave isn't difficult. Basically lets you set your own intervals. Personally, I don't want it autosaving constantly.