I hate to say it as a top laner, but teleport needs massive changes/rebalancing
I say that I hate to admit to it because teleport is the only that that keeps top laners relevant, especially in competitive play. But it's still fairly common on mid laners and it often just becomes a spell geared towards spamming TPs down to bot lane out of nowhere.
I understand at this point, the game is probably being balanced around teleport. But increasing its cooldown again isn't an option. And ruining it would completely ruin top lane. And honestly, the fact that you're almost forced to use it to be relevant in early/mid game stages and it's almost exclusively used for teleporting bot in thy scenario is really unhealthy.
I honestly think you should just kill its global range and make the range scale with level. At say, I don't know, levels 13/14, make it global again so split pushing is still an optimal strategy. But this constant porting bot for massive clown fiestas isn't healthy and it's time it stops.