well, after reading the news about changing the EU to "Legends", I stumbled upon this video (again):

http://www.youtube.com/watch?v=buXz4BYS8kw

made me think over some (plot) points - the "importance" to make Obi-Wan the main character of the prequel trilogy (and maybe Sidious or another Sith/Dark Lord his adversary)

and to make things "radical" ... how about moving the whole Anakin-pupil story right up to the very first minutes of Episode 1 (and closing it there?)

meaning, that we later only follow Obi-Wan on his path to understand the power of the Dark Side, as his fellow Jedi try to stop the waves of evil wash over the crumbling Republic - this could be the last Clone War (as there were some before) and the Mandalorians could play a vital role in this one

we just see Anakin as a support character, that vanishes like others during the struggles against "Sith" invasion - his turning point could be right at the start or later, his motivation needs to be clear (not only to "save his wife")