After having ran across the Tower for the Factions, I feel like having three separate landing zones/fast travel icons for the Tower would be a great idea. Having one in the middle is okay, but if you're coming from one side trying to get to the opposite side and fast travel, you still have to run half the distance to get there. It's not a huge deal, but I feel like it'll make everyone's lives a little easier being able to get to where they need to be quicker. Just a thought.
EDIT: I suppose the main issue would be the fact that the occasional Ikora spawn happens for a reason. The central spawn point gets overloaded, so you get placed by her instead. That makes it clear that this is very possible, and just being given the choice of where to spawn would benefit those load capacities. If anything, it would cause the player loads for that one area to decrease since there would be three options.