Okay, just gone through the thread and read some suggestions, and here are the ones I like the most:

ben_danger's:
- i would vote to remove any noticable features of sidious so its actually a surprise when his true identity is revealed. would be cool to have dooku in his place on TPM, and to do away with the rule of the two.

I think that's an interesting idea. And the "rule of two" is stupid.

I also like Bingowings' ideas, and if Ady doesn't implement them, I might actually do my own edit in the future along these lines.

And, from TheoOdo:

* All lightsabers, excluding Sith lightsabers, should be changed blue. Why? Because then Luke's new lightsaber in Return of the Jedi has some meaning. It's the beginning of a new dawn for the Jedi. Whereas in the old republic they used blue sabers, in the new republic they will use green just as the founder Luke did. I think that would be neat.

I LOVE this idea.