The seriousness of certain episodes was undercut too many times by the humor. Ol'girl getting tuned up by her boyfriend could have been a real good one had it not been for the shifts in tone. Gina could have elaborated on how she got AIDS to bring more awareness. I know it's a sitcom but damn...
Whitley and Byron getting married all of a sudden with little onscreen build up? Could have stretched that out over season five or four when Kinu was in the picture to create better tension for Whitley and Dwayne of bounce off of and nix their engagement instead of doing the on-again off-again thing. Whitley gets engaged to Byron around the middle of S5 after a S4 build up, Kinu is overly supportive of Dwayne being a professor and provides moral support but Whitley and Dwayne are missing something. Could have used Byron's character to seriously address certain episode topics for his campaign like the one above, Whitley already cheated on him so it wouldn't have mattered if Byron was an all around good guy, Dwayne would have just been better and someone she needed given her character arc. They could have written that altar scene better as a build-up with Whitley having second thoughts post engagement and really assessing who she became since the start of the series:
Dwayne realizes, after cheating on Kinu with Whitley on a couple occasions, he loves Whitley and leaves her the night before the wedding.
Whitley realizes, after cheating on Bryon with Dwayne on a couple occasions, she loves Dwayne and leaves Byron at the altar.
Could have even set that up in a way that Whitley had no idea Dwayne left Kinu the night before and leave him out of the episode until the climax. Then Kinu returns.
Freddie seemed like they mixed Marisa Tomei and Lisa Bonet's characters and didn't exactly know what to do with her, Ernest could have still been in the picture when Shazza came around. Kimberly's medical career ambitions should have been put to the forefront.
Too many filler episodes messing up the continuity of the story.
Characters were getting tossed left and right.
Bradford Taylor's daughter disappears with no further mention? She could have been the X-factor in Dwayne's rotation to bring tension between him and Taylor.
Writing was flat, and I think it had to do with there being too many writers on the show.
Sinbad had the best character arc.