Sorry. You are so much fun.
Can't speak to THAC0 and Non-Weapon Proficiencies, never having used either, but the other two are to me features rather than bugs: they're good examples of using appropriate tools for different jobs rather than trying to shoehorn everything into one mechanic.
Thief skills being d%? Absolutely - allows for far more granularity than a simple d20. (ditto for various other things that use d% e.g. system shock rolls)
Saving throws? Absolutely - along with what class and level you are and what stats you have, what you're specifically saving against makes a difference in such a system - it's an added variable. One of these days I'd like to expand this further - maybe go to 8 or 10 different types of save rather than just 5 (e.g. split out Poison, Paralyzation and Death into their own charts rather than have them all the same).
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*Some might say ... a Generic and Universal Resolution Procedure for Systematized play.![]()
I always liked Not Even Remotely Dorky.
Calm down, Ogre.
Why was this thread that has drifted into jokes and been dormant for ten days resurrected after the other thread was closed?
Great question.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.