I only vaguely recall the first couple of seasons of 90210 but the characters are iconic and the og show was so much a part of pop culture in it's day that the new show was great fun. The whole Shannon D thing was distracting and disappointing. Why not just own the drama you created? 90210 wasn't the only show she got booted from, why not go with it? Trying to make her a good guy is a missed opportunity for her and the show.
Review of BH90210
