@Matter2Matter I use to play Caustic often before the developers and content creators basically decided that only certain Legends are allowed to be meta, even going as far as to say Mirage can never be Meta at one point (I think it was Mirage). The traps do have a radius issue, I have run past some door traps and people have run past mine. The season 10 buff might help to get his pick rate up again, but then they messed with the only part of his kit that worked and nerfed his ultimate, so I'm afraid he still won't be played.
Off-Topic
I honestly wish we could have a balance between Offensive, Defensive, Support, and Recon Legends, it just feels like some classes and Legends get way too much love and others don't. If you just have a look at the Watson debate and she DOES need a BIG buff I don't care what the developers say, Caustic isn't far behind being useless, but Horizon gets a buff back to almost her old self. Why? It feels like the developers are assisting a certain playstyle instead of allowing the community to play as they wish. I don't care if some don't like Caustic, I don't like Wraith mains, but she is part of the game and I deal with her, same with weapons. Spitfire, well if it's OP (And it's not, I'll still outshoot you with a Flatline) pick it up, stop crying when you get shot by one and use it.
We need more or less the same amount of Legends per class I would say or just delete the class if you can't balance them all out as currently the trap legends are lost.
Apologies for the rant, I was just going to say the traps have an issue and all the other issues came trough, sorry