Nvidia: 1. Download Nvidia Profile Inspector, this tool shows you an expanded list of settings included in your Nvidia drivers @ https://github.com/Orbmu2k/nvidiaProfileInspector/releases
2. Make a profile for RE:2 and limit the fps like this: Note: If the 120 fps setting ends up giving you a lock higher than that just lower it a few steps. The advantage of Inspector is that once you set your limit you will not have to run the app again and neither will it have to be on during play.
AMD: 1. Download the latest Rivatuner Statistics Server @ https://www.guru3d.com/files-details/rtss-rivatuner-statistics-server-download.html
2. Make a profile for RE:2 and limit the fps like this: Note: This app will have to be running while you play. It also works for Nvidia.
In-game Settings: V-Sync, if you're on a 60hz monitor turn this off or you'll be locked to 60fps. If you got a 120hz monitor you can skip the above tools and just turn v-sync on to lock it to 120fps. Framerate, keep this at variable if you're running 120/variable categories and set it to 60 for the 60fps one.
It's either an accepted part of the category itself or it's not, there's no prestige in abstaining from using something that's allowed. If someone personally disagrees with it and don't use it then that's on them.
I think adding any kind of variables is a big mistake, that's something you do for categories themselves. Add a new 'purity' speed-running category or something where no glitches are allowed at all if anything.
Where else would you see this for something competitive? A record is a record, there's no shades of grey here.