Well Eureka was a small map, you could explore it on day 1, there was close to no story involved (with the exception of the end of Hydatos) and the rest was a meaningless, boring mob/Fate grind. So... while you enjoyed it, I see no value in holding back both Teleport pylons and riding ability behind some arbitrary level system.
It was especially annoying if your group was comprised of people that could ride and people that could not. Thank God for tandem mounts.