I personally don't see anything wrong with other countries taking the lead on this, all things considered. Better yet, I wish they would have taken a stronger lead without feeling the need to wait around, but that never happens, I guess. I do not like the idea of our country helping out on another front, but as long as we only extend the help we have to this point I guess I can understand it somewhat. The second we commit a ground troop to the mix, I'm going to be a huge critic.
As for the timing of it, I think Obama showed prudence and when it became clear that the zealot was going to stick it out to the end and try to win his civil war, it was determined that was the time to jump in by advisors and a now or never way of thinking.
I have no real issues with the timing of everything, at face value, but I haven't studied this whole thing that deeply.