I respect anyone that does any kind of homebrewing.
Doing a retheme, you are already halfway there with trusted rules and geometry for whatever game you picked, still a lot of work and deserves respect
Doing a from scratch build, coming up with your own layouts, your own rules, is the epitome of "making a pinball" I would argue this is twice the work with more risk and deserves more respect.
As far as the twippies go they can suck it. They didn't use all the pictures or info I submitted with my game. And I only submitted it because they reached out to me in the first place. They probably just needed to stack the category that year? Who knows.