Being able to fast travel anywhere is way too convienient, and it also makes the use of carriages pointless. I really hope in future elder scrolls games they will take away fast travel, or at least decrease the number of areas you can travel to. I think it would be a lot better and also make sense if they made it so you can travel from a hired carriage, (or personal carriage) to any small village, or Hold Capital.
I just think it would be nice if the carriage drivers weren't pointless.
On another random note, hopefully they have ACTUAL moving carriages traveling the road's, not just broken ones lying in disarray on the side, in the future.