Warping to Friends
Just going to make a note here. Warping to a friend in a different overflow server is fine, but there is an issue that I am sure ANet would have to overcome before they can implement a Warp to Location function.
Just so this is clear, the current “Join” function only allows 2 players that are in different OVERFLOW servers to be in the same overflow server. If the target player is not in an overflow server, you cannot join them as you cannot enter the main area server until your spot in the queue comes up, so the Join function will either not work or not be present.
The issue to warping to another player location is that if implemented improperly it can be used to bypass content and “ferry” another player around the game, skipping content. From pretty much everything posted by ANet that is even remotely related to this, they do not want people to be able to skip content in this, or any other, way. For example, someone new to the game could level up to 80 using crafting only while their buddy went through the game to Orr the normal way before they even started. They could then jump them through each area, waypoint to waypoint, all of the way through, only doing their story, to Orr. Anyway, based on this outlook by ANet, if warping to an actual player location were to be implemented, it would have to check first to confirm that the player doing the warping had already discovered the area being warped to. If they had not, then the function would not work and probably give some message why. If they had discovered that area, then they would appear at or nearby the target player, which also has considerations to confirm the location they appear at is valid.
So yes, it would be nice, but it would be something ANet would have to put a bit of work into.