I quite like having different classes of Knight, not quite sure how you would be able to convey that across within any edits of the PT. I maybe biased on this points as I'm a massive fan of KotOR 1 + 2 which have Consular, Guardian and Sentinel classes.... One distinguishing feature there was lightsaber blade colour was related to class (though not written in stone, my Jedi Sentinel will never have a yellow blade!) I think an early SW game also had classes but I must confess that must of been before my time...
I maybe stoned for this, but generally I quite like the Jedi Robes as they are in the prequels, they are also a little different stylistically from ABi-Wans ANH variation, and Jedi like Ayala Secura (who should of had a bigger part IMO) went much more "modern".
While we're continuing Prequel wish lists. I'd of like Yoda to have killed Grevious... Having seen Grevious kill several Jedi, he confronts Yoda... Does his fancy lightsaber twizzle, and Yoda just squashes him from something from the ceiling.
Also another Gripe, I'd of like to of seen more of Bail Oragana (i.e. Leia saying to Obi-Wan in ANH; you served my father during the Clone Wars). I'd also of liked to have seen a young Tarkin, rising through the ranks of the Republic military ruthlessly. Could of had the Jedi objecting to his methods...