I don't think they could risk a Tina/Carla showdown or rather a Michelle/Alison acting showdown! This would just show up the simple fact that Alison would act her off the screen.. I am delighted the Tinacharacter has been killed off because although her acting is mediocre at best, she has been crowbarred into practically every story and every scene far beyond her ability. Ok I wouldn't put her in the acting dump with the ones that play Fizz, Maria, Tracey, Andrea or Michelle but she isn't much better.
I think she is doing a sensible thing in leaving, I only hope she does start to seriously concentrate on acting and not go the glamour lads mag way that Helen Flanagan did.
I don't think winning sexiest female (or male!) should be a proud moment for an actress/actor, surely it should be about the work? I rather think this has gone against Michelle Keegan really.