thought so, thx

Yes, as this mod replaces "stage_coach.building.json", which handles everything stats wise.

does this conflict with mods like better stagecoach?

Generally.

Should I disable bigger balanced roster when enabling this?

Completely get this is for personal use, but if it is gonna be public, would be nice to know the values you have for this version in case it's more in-line for what someone wants compared to the max 50 version