I'd just like to expand a bit on why Gothorita doesn't do quite as well as it should in NU.
Now Gothy's main purpose is to remove walls, right? It comes in and sits there racking up CM boosts + resting off damage until it's ready to remove the threat, clearing a path for your sweepers to go to town.
Just so. Now let's take a look at the walls Gothy can reasonably expect to trap and kill in NU, assuming a moveset of Psychic, HP Ground, CM and Rest with the standard bulky spread:
-Alomomola
-Weezing
-Regice
-Mantine
-Gardevoir (offensive/trick choice sets are things to be careful of; scout first)
-Vileplume
-Miltank
-Roselia
-Audino
-Wartortle (haze is uncommon, but an issue)
-Tangela (be very wary of knock off/leech seed variants as they will usually beat you with any prior damage)
If it comes in on any of these Pokémon, it can generally set up with impunity and remove the wall.
And here is the list of walls that we are unable to trap due to the wall commonly carrying a phazing/pivot move:
-Musharna (baton pass)
-Lickilicky (dragon tail)
-Probopass (volt switch)
-Bastiodon (roar)
-Golbat (u-turn, taunt)
-Meganium (dragon tail)
-Lairon (it sets rocks, goes to sturdy and custap endeavors you, GG)
I'm a lot more concerned with the threats in the second list than I am in the first. They have standard sets which allow them to bypass the trap mechanic and come back later to continue walling your offense.
My point is that it's a trapper that can't trap a few of the most prominent defensive threats in NU, thereby rendering it inconsistent and causing low usage. It's also dead weight against hyper/bulky offense that often forego dedicated walls
