With regard to the individuals and their objectives, it really isn't up to us to second-guess.
If Anneke wants to be a housewife and mother who still sings occasionally, that's up to her. If she wants to be an international superstar, that's up to her - and any shade in between.
If TG want to continue to invent the kind of layered, textured music that we've become used to, that's up to them. If they want to go minimal, "indie" (a daft label), post-rock or whatever, that's up to them - and they can and will choose any position they like.
What we're left talking about is what
we make of it. If we approach the music with our metal heads on, we're likely to be disappointed right now. But in the meantime, I wonder ... it seems to me that Anneke has popped up on Dutch TV quite a lot recently, perhaps more than when she was "a singer in a metal band", and that may well be "success". However, if "success" is what she wants, I'll wait and see if she pops up on, say, British TV. For example, if Anneke could ever find her way on to one of Jools Holland's shows, that would be quite something. There's some kind of "received wisdom" going on in the Jools Holland camp. Goodness knows what it takes to penetrate the protective shield.
My suggestion to Anneke would be "Keep on writing songs, and if you're going to record covers try to make them distinctly different from the originals" - but that's just me expressing my personal opinion.
My suggestion to TG would be "Don't abandon complex layered music", but ditto.