Legend discussion: Caustic

Hello all, I'd like to talk about my favorite character: Caustic.

Caustic is in the defensive class and specializes in zoning and holding buildings/choke points. His gas is intended to deter enemies from fighting you and giving you a minor advantage should they choose to fight through your traps/gas grenade. He's got a cool concept and is my favorite character personality wise.

I feel that he has some flaws though.

He is one of two large characters. His hitbox is huge, and despite being a defense character, he has no defensive capabilites to help him physically survive. Gibralter is another big character but his shield compensates for his larger hitbox and ease of spotting. His dome is insanely powerful and can block pretty much every other ult in the game. His ult is the most impactful in my opinion seeing as it can completely down and out somebody in one use while lighting up the teammates as well.

Another reason caustic feels so empty when matching up vs Gibralter is his passive. Seeing people in your gas feels like it should be inherent for the traps and ult and not a separate ability.

I believe Caustic needs some sort of utility to assist his team or some durability so he can fulfill his tanky role. Maybe a new passive could change this, I've got some ideas and was wondering what you guys (and hopefully Respawn) think of this:

1.) Passive: When Caustic's shields are broken, he emits gas from his location (as if a trap was detonated on the location where his shields broke)
2.) Passive: While standing in smoke, Caustic and his allies generate 2 shield per second (offering utility for team and more decision making/application for traps/ult)

3.) Passive: Caustic receives reduced damage when standing in his gas. (again, offering caustic durability so he can be more relevant as defense, even outside of buildings)

4.) Passive: Enemies do not receive damage numbers and hitmarkers when hitting you and your teammates in gas.

Maybe he just needs a new passive altogether aside from his smoke, I'm not sure, I just feel like a lot of the characters have much more in their kits and I think Caustic needs more.

Thanks for reading.

TLDR; Caustic has an empty kit, he is very weak when not holed up in buildings, he has a larger hitbox and does not provide defensive bonuses to compensate despite his role as defensive.