Could it be possible to have a config to be able to toggle some fixes as some are redundant with other bugfix mods and because i don't want some bugs to be fixed.

As of release 1.3.0 thorium includes an experimental config system, allowing you to toggle fixes. The config can be found in the .minecraft/config/thorium folder (config/thorium on dedicated servers). It will have a GUI to edit it later, keeping the issue open until that is added too.