The screencaps of the Emperor's guards brandishing their pikes at Vader - what scene is that from?!? It looks REALLY interesting!! Awesome to see the guards with their force pikes ready to strike. And it's nice to see that Koo Stark's scenes are featured (since I'm somewhat of a fanboy of hers).
As for the Darth Maul as Grievous thing...although I think it doesn't matter because the prequels aren't canon anyways, it would have added much-needed dramatic and emotional depth to Grievous' character (because otherwise he just comes out of nowhere), ESPECIALLY for Obi-Wan. Not to mention Grievous is supposed to be a "precursor" of sorts to Vader's cybernetics...and Palpatine bringing back both of his apprentices with cybernetics would be an interesting recurring theme. I remember some comic somewhere that showed a cybernetic Maul, and he had legs similar to Grievous...maybe his design was based on early concept drawings for Grievous/Resurrected Maul?