Tovi, nice to see your approach in there - but some gamers get angry, when they discover a crucial error and can't redo it by re-loading.
Imagine, you forgot to get all 3 Raanaar books to understand all manuscripts in Act 4 - or you didn't know when linearity kicked in and missed a lot of unfinished quests etc.

So, I do think, it's better to make a different save, here and there. Everyone to his/her decision, though <img src="/ubbthreads/images/graemlins/smile.gif" alt="" />
Kiya