No, I'll give it a chance. But if it's not any good I will make the decision to stop watching then (especially if my favourite pros don't take part or are eliminated early).
I'm not sure about what you say about the show losing credibility. Credibility in what sense? It was never very credible as a dance competition- you lose that as soon as you invite the general public to vote. Arlene, Bruno and Craig have never been all that credible as ballroom/latin judges, when that isn't their field of expertise (although obviously much more credible than Alesha).
It further lost credibility by bizarre judging- Arlene's attractive young men bias, Bruno and "his girls", Craig and Emma Bunton, Len and his SPORTSMAN fetish.
The only aspect of it which really makes it creditable in dance terms is the standard of the professional dancers- and even there the BBC would prefer to recruit Hayley Holt over Nicole Cutler.
Where it has credibility is as an entertainment show. I certainly don't defend the decision to recruit Alesha, which strikes me as absolutely barmy, but it's really one more step along the path it has been following for some time now.
I only really watch it for certain dance aspects, mainly the pro dances and the chance to watch my favourite dancers at work. As long as that aspect of the show remains, I will still enjoy it.