But the thing I've been thinking about, the thing that makes me want to play a little 2nd edition again, is the "backwards" rules; rolling under for some things and over for others. The idea of rolling below your stat for an ability check is just great, from a GM stand-point. Think about it: I don't have to come up with some number out thin air like you oft do with 3rd edition and its "Difficulty Check". Just roll under your ability. Need to raise a portcullis? Roll under your Strength. It's a simple, easy mechanic that just makes the GM's job easier.
Now, I wonder if you could make a new Saving Throw chart, based off the old one, that could reverse Saving Throws so that you roll under for them too? Like subtract the listed number from 20 and that's the new number you have to roll under. That way it's one more thing that is "roll under" so as to be a little more uniform. I doubt there's anything to be done for combat, though, high rolls are still good there and I don't think anything can be done about that. Not that I'd want to anyway. Imagine the amount of "20's" you'd roll if suddenly "1" was a critical hit? That's tantamount to gamer sacrilege.