I have suggested this before in different ways. You have to remember that there is 2 command features that teleport you to different spots as well to help with travel. I use unstuck me alot when traveling to graal city or south to swamp/dw. If i want to go to mod I usually use the unstick me.
I'm sure once ppl get acclimated to the new rail system they will learn where they can cut corners to get into certain areas faster by using the rail system and hoping off at certain points and then using a mount the rest of the way to their destination rather than taking one or the other the whole way.
Also when event's pop up I'm sure using the rail road might be the best way to get to harder to reach remote areas like snow with out having to fight through clogged up crowded paths you would run into when traveling by mount even if it takes a few seconds longer.