I think that a short range teleport could easily come with some other benefit. id prefer to use movement to teleport, so that you can split the movement, but I’d accept that usage as an upgrade at mid level.
On a rogue, this might allow SA on a creature that you end your teleport next to.
On a Monk, I’d say you could use Unarmored movement as the number of feet you can teleport, and if you use Step of The Wind that distance doubles. Then I’d also give a tiny blip when you Flurry of Blows? Maybe you can split the teleport for the rest of your turn?
Oh! Maybe you can teleport as a reaction at level 6 in response to an attack? Maybe it works like deflect missiles, and you can punch them by spending a ki if you reduce the damage to 0?