Sorry for taking so long to reply (the real world has been a hectic place, and this is one of those really time consuming things)...

I think the issue we're facing is changes to the UI. Since it works on the Xbox, I'll have to have another look. When I find where I put my xinput compatible controller (I moved), I'll see what I can find. At the moment I'm fairly sure it's UI changes which change the input handling, so there may be a way to do a compatibility load. I'm sort of unhappy with the solution in many ways, but the issues surrounding something else I was facing were actually fixed in MT, so maybe I can finally understand a couple of underlying issues when I get back to decompiling.

(Probably worth noting that I lost a hard drive, and that disk had all of my reversing work for Trop4 on it, in part, slowing progress.)