I smell a clique of 'We Hate Fiz!'. Why can't you people have independent opinions on a character rather than all jumping on a bandwagon?
Fiz is a well-rounded character that works well in a relationship with Tyrone. They have been, I believe, dubbed the new Jack and Vera. With a bit of work, that is not an impossible feat, and out of all of the shows couples, they are the couple that could fill those shoes in the most realistically. Okay, Jennie McAlpine is not the most versatile performer, but she is capable of holding her own and that is all that matters, really. And Alan Halsall is a very strong professional.
Oh, and for those of you that are unable to string together a coherent sentence without missing words or not checking for spelling and grammar errors, her name is Fiz. F. I. Z. NOT 'Fizz'. Fiz. It is not that hard.