Funnily enough, the three features you mentioned as an example were already in rystaf's version :)
I have a changelog that lists all the new features, changes, and bugfixes compared to the FHF fork: https://code.mschae23.de/mschae23/mlmym/src/branch/main/CHANGELOG.md
The reason for this chain of forks is that the original version (rystaf/mlmym) has been abandoned and the maintainer is unreachable. The FHF, running old.lemmy.world, made a fork to support their instance, but they understandably don't have a lot of time to maintain it.
And I basically just started improving the project and fixing bugs a few months ago, using their version as a base.