Sharon's first real exit was amazing, and the chemistry between Letitia and Ross had was in full display. It's also a great display of Tony Jordan's writing, the way he manages to get to the heart of the characters in a believable and uncontrived way. When he wrote the major episodes, he wrote all characters fantastically, even the ones that had little to do with the main story.
Sharon was an important link character between the first era of the show and the second era that the Mitchell's ushered in. I wonder if they would have had a lasting legacy on the show if the Grant and Phil never got mixed up with Sharon. Shraongate to this day is the definitive story for both Sharon and the Mitchell's.
Hell, they've also managed to piss on the character development Sharon had in her 2001 return - John Yorke did a lot of work to make sure Sharon moved on from the Mitchell's and especially Phil, but all of that is gone now. It was Sharon who walked away from Grant and later Phil, but you'd never know that when watching Sharon in her current state.
Th wigs they used to put on Barbara Windsor when she first joined the show are hilarious. I don't think I started to like Peggy until the Matthew Robison era.