Well, I would not recommend swapping to manual steering. WIth 33's it's borderline. Offroad, you'll really want P/S. If you never go offroad then it won't matter that much. If you sell the Jeep, you'd get more with P/S.
Swapping to MPFI would be a midsize project. You'd need the gas tank, fuel pump, tank skidplate, fuel lines, PCM, engine harness, fuel rail, intake, and some other odds and ends. You'll gain an honest 12hp though.
33's on a TBI would be kind of pushing it. I think I'd go with 31's with a stock Jeep if you won't want any major power drop.