Lemme just say this - I love FARL, but I also love the feeling of slowly, painfully making my way across insane lengths of a RSO-based rail-death-world. And even with Heavier Trains on, FARL just feels zipping and zooming along, even on coal.
What I do in my game is to mod-mod this to slow down FARL to a max speed of 25kmph (!). That makes it important to use multiple FARLs on ghost-follow mode and doesn't undermine the distances at all. Conquering the vast emptiness... uhm... alien-ness of the Nauvis actually feels even better than ever.
Could we get something like that as a startup option? Say, "max speed" with 10-100% choice or such, or maybe lowering the locomotive's power?