Well in my honest oppinion, doesnt seem bad to make teleport only available when you get to a crystal or node, if the lore says that u can teleport because u travel via world streams you should be standing right next to one to be able to jump in.

And would make things a little bit harder, like if u are at some camp all by yourself with plenty of mobs you need to evade them, like logging off right in the wolf camp in natalan, would add some exitement dont you think?