You guys make great points, and I do still consider a lot of the expanded universe (even if it's not canon anymore). The following is my opinion, but I don't buy the Sidious was manipulating everything in that fight. To me, the main difference between the mace X Palpatine and Yoda X Palpatine fight was due Lucas interest in doing the last fight to mirror anakins X obiwan in grandeur. But by movies alone, I agree mace was not that impressive.
The reason I don't buy the manipulation theory is that no smart being would leave so much beyond his control. If Anakin had not disobeyed Mace and gone to where they were fighting, he would be dead. To me, he gave the final push to Anakin exactly because he needed it in order not to die cause he lost to mace.