I really like 2-4, I think it would be awesome to have seen 5, and I am totally agree with you on the first part of 1. I just don't know if I would have wanted Obi-Wan to have left the order. I think it might create more tension and regret with Obi-Wan defying the council while being a member of the order than while not. Then again, I was never a big fan of the Jedi council. It is never mentioned in the OT, and I don't know that it was entirely necessary. At least, not the way it was done.
I always pictured the Jedi having a temple(s) on a egyptian like planet. Lots of pyramids and spires and such. I really never cared for the idea of them being on Coruscant. I thought of the Jedi being more like you read about in the Tales of the Jedi graphic novels. Academies on distant planets. Knowledge being stored and yet forgotten. All types of different races and lightsaber colors...
If only
