When the blonde kissed Sheldon, it would have been absolutely awesome if he then responded by kissing her right back. And then have the show end that way with him kissing her.
Instead they chose a super lame ending.
Whilst I think that what happened was a little over the top (even for Sheldon), and they wrung it out a little too long, ending it on the kiss wouldn't have been suitable to the show.
Perhaps having Sheldon pondering possibilities (similar to him asking Gollum what to do with the ring after Amy finished with him) would have worked.
Okay, I can accept the less racy ending you suggest also. Would have been fine with that.
Agree that they have really gone over the top with Sheldon's character and its unappealing. Its also making the show really lame to march all the main characters to matrimony and take away so many possible juicy plotlines.
The one you suggest with Sheldon pondering possibilities, or maybe a love triangle developing would be fantastic!