You have a great idea but are on the wrong forum to discuss it, as this and every other political forum are filled with hyper-partisans. Anyway, a centrist party would be perfectly aligned with the Overton Window, right? I think it's the place to be. Currently Trump owns the Overton Window. It wouldn't be that hard to take it away from him. But, before you embark on this, who is going to fund this Centrist Party? You will need a lot of money, and it you have to court the same elite billionaires that currently fund the two major parties, they will demand more of the status quo that benefits them, not the people. This is the reason the two major parties don't function for the people. How would you solve the money problem of modern politics and keep from becoming a third corrupt party?