Faster clear speed is often what players in these types of games strive for - I don't see that being any different in Last Epoch. If we see a skill that can go from screen to screen in a split second destroying everything in an area that is supposed to be challenging it's safe to assume that we'll combat that build in some way. A big way to prevent this up front is to build skills that do not hit the entire screen instantly. We've also decided to make mana matter much more than a lot of games by not introducing mana potions and giving powerful abilities high mana costs so you can't easily use them back to back.
I will not let our game become movement skill > screenwide kill > movement skill > screenwide kill, repeat. If you notice that happening in the future, copy and paste this comment to me and I will ensure it gets fixed. ;)