Why does Ash not have the ability to teleport freely? It's not because DE doesn't want frames to have it. Both Nova and Kullervo have one, and to an extent Nezha and Titania both have one as well in the form of chakram teleport and blink respectively. It's not because they can't make it work, since he already has an unlocked teleport in Conclave at reduced range, and it can function either exactly as it does there or exactly how Kullervo's functions with a required hold to cast. It's not because it would break the finisher setup because, again, there is no problem with Kullervo being able to decide to do a heavy attack depending on if an enemy is targeted or not.
So seriously, why is the frame with the ability called "Teleport" not able to teleport as he pleases?