I wasn't around for the Brenda/Sonny bit, but was totally unimpressed with her this go-round. She just seemed b*tchy from the beginning, & not likeable at all.
One thing that made me laugh is that they referred to her as a "supermodel". Since when are supermodels short? They all seem like they're 6' to me. Same with Erica on AMC & Gabrielle on Desperate Housewives. All 3 are quite short & would never make it in high fashion modelling. I guess on TV they can take these liberties if a woman is attractive, but come on! Never-Would-Happen.
As to Stavros, he was also before my viewing time. The only thing I knew about him was that he was somehow Nikolas's father. So I googled the character & read up on him. Quite the story. Apparently he's been "killed" numerous times, the last time he fell down some kind of deep pit, I think pushed by Luke, maniacally laughing all the way.
He seems like a good replacement villian for Helena.