I'll say no to this idea.

We can already teleport everywhere and summoning just doesn't seem necessary.

If we could not tp, then I'd say this is a fine idea.

I'd just rather not have people being so lazy they can't even run across a quarter of a zone and whine for a summon instead.

I'd just rather not have people being so lazy they don't even know where to find areas of the world because they have been summoned everywhere they traveled.

There is just too many other negatives and the only positive is travel speed, which is already addressed with teleportation.