That works for me -- I was mostly worried about the low level dragon quests, but if destinations will be changed for these, I don't have a problem making the first run out there for attunement.
I always wondered why I could portal around the world freely even at a low level, to be honest. If I remember correctly, some of that had to do with the way Istaria was originally designed around T1 characters (?) As a new-ish player, I look at the long list of portal destinations and have no real clue where the cities are located in the world, what their level of content or significance is... and part of that may be because I never had to "make the run" to these places.
There is definitely a different feel about entering a new, unexplored city for the first time after having traveled a long distance... vs. portaling to the city just to try to put a name with a location. It also makes the world feel bigger to a new player to not have all locations already unlocked from the starting island. It gives the sense of something unknown waiting to be found.
I guess my next question would be, then -- is there a thought for a revamp of level 10 dragon questing? I may be getting ahead of myself, but it would be nice if the quest line for the level 10 skills was condensed into one or two trainers (as they are in NT), rather than scattering between many different trainers in two cities. I felt the quest line for dragons in NT did a fantastic job of teaching me the ropes -- I learned all the basics and leveled to 11 without any trouble, from those quests alone. I would love to see that continued.