Hehe, just posted a reply to your youtube comment. I think the super spin could be dumped after looking at the footage.

-He lights the saber

-Maybe add a "Force run" type sound, like a boom.

-Then just go to the shot of him landing in front of the Jedi.

For sure it would make for a "Oh sh*t!" moment. Like Palps is super bad ass.

*Edit* As for Mace being the only one left alive. I'm still going the route that Palpatine doesnt kill Mace cause he needs him to help turn Anakin. This is all part of his plan. Thats why Mace doesnt die. Otherwise Palpatine just has 4 dead Jedi in his office, and alot of explaining to do. So no need to show that Mace saw him coming. Palpatine wasnt gonna kill him anyways. Well at least, not yet.