It's a bit of a long story for me.
Well, Morgan intitally came off as a fair minded, kinda snarky person when she first came onto X-Play after she left the Screen Savers. She, like Aam, gave fairly balanced and reasonable reviews while participating in some pretty damn good sketches. I think after the buyout by G4, the change she made was too noticible. She seemed to really go out of her way to say anything negative about certain companies or properties, and most gamers will tell you its her seeingly undesrved grudge against Nintendo that has her on many shit lists. If you ggogle "Super Mario Galaxy' and "Morgan Webb" you will see one such example of her behavior. (Its even funnier when you see what she initially said about the game and then a few months later see the opposite stance she takes.)
I have to be fair to her though, as a friend of mine is a freelance writer and has worked with G4 before; she likes PC games more than most console games and she is an Unreal fanatic. That said, many of the things that she has said in the past while working under G4 has made me question her stance on certain aspects of gaming and the business, as I believe if you are going into the business of reviewing games, you must do so with as little bias as possible. This is why I do not particularly think she should be left in charge of running X-Play. Hell, some of the things she says during E3 are cringeworthy.
But that's just me. You may appreciate her more than I can. I do respect her opinions sometimes, but not how she handles certain things.