ZZ'rot portal is getting more popular but i feel like something is missing in the visuals.
The last time i used it it didn't have this, and i don't think it has this already so here is my idea:
In the visual when you place it down, make a line where the minions will try to go (the shortest path to lane, and to see its lenght)
this makes it easier to know if the minions will make it to a certain turret or not. look at the image for more info.
edit: i did the photoshopping in 1 minute, but i didn't make it to win some art contest, i made it to clarify my idea. also the lenght/place radius might not be correct, just for the idea behind it.