This is such a weird hobby: To comment on specific alien individuals change of employer would be quite absurd in about any situation. Especially if you consider their work to have no value and their employer to make poor products.
I'm pretty much indifferent to Square Enix in general, but I like a good deal of Hamauzu's music, though I don't like the FFXIII soundtrack too much. I think it would be nice if he managed to become a solo artist, and that should be within reach when he has worked on that game, shouldn't it? I hope so. But if he doesn't manage to make publish more work, then there's a lot of Debussy, Satie and Ravel I haven't listened to yet. And they make good music too, which Hamauzu's is reminiscent of. And yet, there are other French composers like Fauré and Saint-Saëns with the same kind of sensuality, so to say.
If Mizuta continues producing music I never listen to for games I never play, I'll say "good for him". If Loof Lirpa does the same, I'll say "good for him". When Hamauzu makes average music for a game I'll most likely play, I say "good for him", and if Yamaoka starts playing the erhu I'll say "good for him". If the next FF uses licensed music, I hope the licensed music will be good, and that it fits the game. And that should be possible. And I'll say "good for me".
Btw, thanks for your work, Chris. It's very cool that some of you people do free work for the community.