Cool. I just talked to Krysez (the mod owner) and it’s not that much of a problem for them neither, except from being a bit glitchy sometimes. However, he reminded me of another aspect: Consoles couldn’t handle it.
This is true for a lot of already existing issues partially, so I do try to word it at times, such as here: PS4 VS PC Versions of Conan Exiles - #3 by TheLOLxd2
Do you play pc, console or both btw? 
Edit: Oh yea…the glitchyness was also a rendering issue (and consoles are terrible at rendering, I do hope the parity patch fixes some of it.) - from Blue (DevKit dev):
the issue with mounts is that the level doesn’t load in quickly enough to actually speed up the player
(I’ll try asking Krysez about that one too)