Certain mods (like mystcraft for its profiling) need their dimension to remain loaded. If I could blacklist dimensions to unload that would be really helpful

Yeah this has been on the TODO list for quite some time, but with personal affairs I haven't really been able to dedicate time to it.

On the plus side, I should have some free time coming up and I'll definitely get something out. I'm planning on having users be able to filter via dimension ID or custom regex filtering. (e.g. being able to blacklist all dimensions starting with "MYST" or "RFT" for example.)

I'll keep this issue open until I push the update.

Just pushed an update that adds a config file with a blacklist! (It uses RegEx too!) db13984

For example if you wanted to blacklist all dimensions starting with myst just add myst.* to the blacklist.

Sweet! sounds great!