The mod in question breaks more stuff than it fixes. I can't really say it fixes anything sadly. Odd how quickly was the author to say it fixed everything (according to mod description it even gives you a "performance boost" lmao), when there have been already multiple reports of crashes, HUGE memory leaks (even on high end GPUs), ambient peds behaving erraticaly, more evident spawning issues than ever before (from wildlife, to trams, trains, passengers... you name it).
I tried the mod on four different rigs, every possible update that the author put out. All of those PCs with completely different setups, but forementioned problems persisted anyhow. Besides -and most importantly- mod author spent a good couple of days deleting comments of people reporting issues and calling the dude out for his bs. Pretty hilarious how he seems very sure and tautological claiming how he has fixed this old, complex issue, but then proceeds to shield himself by saying the magic words "every system is different" when you report some bugs.
It's also quite funny because not even the author seems to know how the train system works, despite being an active modder. There is a very recent comment from him saying that if you see or rather hear trains as soon as you load a save, then your trains are working correctly, regardless if you see them or not out in the wild or near cities.
So yeah, I would advise everyone to be a bit more nitpicky when it comes to these self-proclaimed messiahs; mod authors who randomly pop in the scene and seek for fame and clout by gulling and fooling everyone with their miraculous snake oils.