Good ending that they got over their issues and that they won but I have some problems with it too.
I think Kaylie acted out of character over the diary, she was really harsh on Kelly which is a side to her we haven't seen before and I'm not sure it was very 'real.' I was expecting Kelly to turn round and say she'd made a copy and decided to out her after all for being so mean! I am glad that Kaylie got to admit it for herself though.
As for Emily, yes she was annoying but it was so wrong that she was not there with them after they'd been through it all together - I really don't get why they bothered bringing her in at the beginning as the new girl at the Rock who they were a little unsure of and grew to like in the end if they were just going to get rid of her the way they did, and Chloe was a great character too, without the two of them the whole show lacks something. There was room for both Kelly and Emily in my opinion and I think it's a real shame if that's the last of the Kmetko's in the show.
Finally, I think that Peyson's fall and injury was a little too 'been there, done that.' I'm sure there were other ways they could have made a star out of Kaylie without having to resort to that old trick again.