I really wish I could remember who it was because I thought it was a great suggestion and it definitely was not mine (though i may have tweaked it in my memory - hopefully someone will recognise it), but the idea was as follows.

Move the arena battle to the start and have anakin and padme already be a couple. I played around with a few clips some time ago (though never shared them as the quality was terrible), but I used a deleted scene where padme and anakin negotiate for obi wan's release along with padme's ship landing on geonosis. Then cutting these in with shots of obi wan sneaking around the droid factory, all in an attempt to make it seem like obi wan and padme were trying to rescue anakin who had been captured by dooku.

This then played through to the creatures attack in the arena and the three heroes escaping on the large one (reek I think). Then in my mind the rest would play out with obi wan researching dooku who simply left the jedi order, the assassination attempt on padme, the Republic building an army but with a suggestion that dooku interfered, and obi wan's missing planet being removed to leave a final showdown between droids and clones on the big battle at the end.

In my ideal version dooku would be a rogue and anakin would have visions which suggest there is a dark jedi threat which nobody has details of (actually anakin), with a possible addition of a scene showing palpatine using force lightning to help corrupt anakin.