I don't understand the issues people are having with Keely's stuff. She's my favourite female character on the entire show, and I say "more Kelly stories please!"
I like Rebecca too, but she already seems miles ahead of Keely in terms of character development and having everything together, being a grown up, etc etc. She's a great looking woman and a millionare Premier League football club owner. She doesn't really seem to have any issues that aren't related to men. Keely is a far more interesting mess of a character that I wish they'd explore even more.
Sassy's great too. More of her would also be pretty good, although not really for story or anything like that. I just think her character is fun and entertaining to have around in the background (I mean in the background of a TV show, not in a real setting... in a real setting, she's be a foreground character and a blast to hang out with (if that makes any sense)) .