The only thing I want to see is Platinum Games remain afloat. I dont want to see them abandon their creative art directions (MadWorld and especially Bayonetta look gorgeous to me), but if the toning done of one title (which does not equate to it being a bland, generic husk of shit) guarenties them profit to stay afloat then of course they should do it.
Platinum Games should do what allows them to create more games. If their current model works, stick to that. If they need to tone down a single game to get some more support and funding for more outlandish games, then so be it.
Asking Platinum to stick to doing the same thing, if its netting them poor return on their investments, is just selfish. Developers dont stay afloat through good intentions and kind wishes. If they're not making a return they will go under, because thats how an industry works, and I'd rather not see them go under.
It's entirely possible for them to survive. Look at Grasshopper. But they're going to need to invest time, money, and resources in the right areas at the right time. Assuming Bayonetta underperforms in the west, people cant seriously expect them to keep investing that kind of money and time into a game as obscure looking as that.