but if MH don't want my money
And this is the problem. I am more than willing to pay money for stuff that I'd actually want to buy. And have done in the past. Sadly this seems to be a thing amongst other companies. I mean I'm more than willing to buy stuff for Prison School, Keijo, Full Metal Panic, Konosuba and a bunch of anime. But they get little more than keyrings or if they do get figures they're really really expensive. Not buying those in turn makes companies think there's no market for them and so don't bother with the middle range products like Nendoroids or Prize figures which in turns has people feeling there's nothing to buy.
One Piece is the same for me right now. I'm willing to buy anything Robin/Chopper that may be put out. But don't wanna put that out? Then sure I'll not support the other characters in hope that they'll do the ones I do want.