I agree; if it's "just music", then don't take the money that people have invested into you.
I mean, it's clear that the band has to really make a hell of a move this time; that may even mean trying to fix some things that are wrong on their end. I know it can't be entirely the fault of the two other singers that things went wrong. I see where both Anette and Tarja developed diva syndrome, but it's also clear that the "boys' club" in the band might be a little too closely-knit and thus make the ladies feel left out. But on the other hand, I have seen where Tuomas has made exceptions for BOTH singers (like delaying albums so that Tarja or Anette could have space in their personal lives; Century Child was delayed while Tarja went to school, and Imaginaerum was delayed because of Anette's pregnancy). So obviously it is more than "just music" to him, or I think he'd be a lot more cold than people already accuse him of being. If he was as terrible as some folks insinuate, he would have kicked Tarja out as early as when her studies were affecting touring or album-making, or when Anette became pregnant.
I think Ray said it best; if they do not end up choosing Floor permanently, I think they would be better off choosing someone who is young and wants to make their musical career their primary focus (i.e., no baggage, no husbands, no kids). I realize the other guys in the band have kids, but as I mentioned in another post, the parental relationship requires Mom to be around a lot more during the formative years, so I can see where this might be a problem. This is why I think Tuomas went against his initial feeling, because Anette's son was of school age and not exactly so young that he was completely dependent on her. But of course, none of us can foresee the future, and as much as he might have tried to be accepting of certain things, he probably did not account for Anette becoming pregnant again and having strong nesting instincts.
As far as Anette's stage performance, I never had a problem with her as a singer or as a performer. I always thought the funky dresses were kinda cute and charming, and I always respected that she never tried to fit into the mold of what fans thought she should be (I know a lot of fans gave her grief that she didn't dress "metal" or "goth" enough). I think she really did try her best to incorporate her unique style into Nightwish, and for whatever reason, it just didn't work out in the end. She had a tough act to follow, and I take my hat off to her just for that alone. Above all, I always respected that she never tried to "fill Tarja's shoes", and she tried to just be herself. Whether that always struck a positive nerve with fans is another story. But for all of her flaws, I would rather Anette be herself than to have been a Tarja clone for the last 5 years. That would have been far more a disservice to us as fans than whatever idiosyncracies she brought to the table that some might have found cringeworthy.