Since I saw AOTC, I thought they were missing out on some interesting plot elements in ROTS by not having Obi-Wan secretly in love with Padme (without Ben expressing his feelings for her, though. I don't think he would have done that to Anakin or to Padme). I think a kind of "love triangle" like that would have deepened the drama, especially when Ben essentially watched her die in ROTS (and watched the torment she went through with Anakin), and would have given Anakin another motive to want to fight Ben, if he sensed his Ben's feelings for Padme. They sort of barely hinted at something like that- but it really never came to fruition.

But even something like that may not have saved the movie- but it would have made it a tad deeper and more entertaining, anyway.