Catalyst NERF/COUNTER

Um, Fuse, Maggie, Crypto?
All of them can wreck Catalysts doors. 
Catalyst is in a kind of weak state right now imo. 
I don't see many catalysts in Ranked. And she has very little Utility there on most maps due to how the maps are designed with mostly very few actual buildings you can hold with just blocked doors. And since blocking doors is her big way of controlling an environment really, she becomes weaker than both Wattson and Caustic in most open areas that lack structures with doors to reinforce. 

The wall isn't that much of a problem either. It should slow enemies when they pass through it rather than blind them imo. 

I don't think Catalyst needs a nerf.

I would only agree if it means buffing Recon Class Ultimates, such as Bloodhound's, so they can detect enemies through the wall. (Since smoke is an ability, I think it's fine for Bloodhound's ability to see through it.)

However, I believe Catalyst already has many anti-picks. You don't necessarily need to limit it to characters; carrying a Hemlok is enough.