Serolepsin: We also need to understand that the wobbly textures are not exactly an issue, it's just something that Capcom kept from the original ps1 release.
It is an issue, to be honest. The reason is either them not caring or the Dreamcast port bogging down the PC version, since they run on the same exact code base. Dino Crisis has the same problem and it was ported the same way, but Dino Crisis 2, which doesn't have a Dreamcast version, doesn't wobble and it's properly transforming coordinate with floats. Go figure, but it probably comes down to cross platform performance or whatever.
Shocker650: If the REbirth team could fix it, why can't GOG do it?
There is no "REbirth team", it's literally just me. Also, the fix is several thousand lines of code rewritten from scratch and injected via a DLL, so I'm not sure simple exe patching can do the trick for this anyways.