I'm worried that porticulums (hereafter "portals" for brevity and clarity) are too few and are spaced too far. It is rather a pain to ride for such a long time between outposts that should have some manner of fast travel between them, particularly with the mob spawn rate being so high.
Ride five feet... jumped by a mob... kill him... another mob spawned... kill him... another mob spawned... kill him... first guy already respawned...
I'd prefer to just portal from one outpost to another so I can get my quests turned in, vendor my gray trash, refine the ore and such. It's not much fun to have to dedicate 30 minutes to riding just from one outpost to another.
Consider that Cata added a metric ton of flight points, so it's nowhere near the *** pain to get around that it once was. I'd like to see rift do the same with portals; if an outpost is big enough to have class trainers and such, it should have a portal.