League of Legends Patch 10.6 added changes to the top lane for both the Teleport summoner spell and Death's Dance item. Riot Games has been working on making top laners feel more viable in mid-to-late game and have the ability to carry from the top position.
Riot Games explained its reasoning in the patch notes, "We're following up with our top lane changes from 10.5 with an additional set of changes for Death's Dance and Teleport. This combination should continue reinforcing our initial goals of helping top laners that are coming out of laning phase build carry items to be a threat throughout the game. The Teleport change should also shift some of its power as an excellent lane sustain tool to a more late-game splitting-and-flanking tool. "
League of Legends Patch 10.6 Adds Teleport and Death's Dance Changes
Teleport will now have a changing cooldown depending on the level of your character instead of a flat 360 seconds cooldown. Plus, the ability will now give a three second, 30-50% movement speed increase depending on character level.
Death's Dance will now have an easier build path, and cost slightly less while giving top laners much needed armor and magic resist on top of the cooldown reduction.
The top lane is a difficult position to balance as you want them to feel powerful during the laning phase, but not dictate the pace of the whole game. But as of right now, the ADC and mid laner have a better chance at carrying a game. With these two changes, top laners will have an item which will help them keep pressure throughout the entire game, and the teleport change will allow them to split push or flank better in the late phases of the game.