I'm A Banana
Potassium-Rich
I don't know if that's true. I think you could drift 4E into the classic AD&D-style play with 1 rule change (extended rests) and then status-quo-ing the "setting elements": dungeon level = encounter level = treasure parcel level = DC level. Mmmm, maybe you'd want to do something about passive perception as well, though that's probably easy (beat the DC, locate the secret door, now explore in order to find out how to open it). But maybe I'm not in the best position to judge.
Combat would still be pretty long, though.
Knowing from other convos how much you've adapted 4e to suit your own style, LostSoul, I think your threshold for drifting might be higher than others'.

