I’ll take advantage of this post and make some suggestions if you don’t mind.
Pathfinder:
I’ve seen this in twitter, as Path is a robot it would make sense that he could zoom in sight even more than other legends. Some kind of zoom in and out like Holographic sights that can be enables or disabled.
Wattson:
Wattson being able to stock 2 ultimate accelerants is kinda bad. That should be able for every legend. The ability to charge her ult with 1 ultimate accelerant and the shield regeneration is a nice touch. Maybe add her an ability to create a Heat Shield with her pylons on the storm, as she designed the Ring, it would make sense that she can counter it somehow.
Crypto:
I find that Crypto’s drone has a lot of tools, but as you said, that’s just his tactical. Maybe a good passive could be that golden sights can’t recon him (you know, appear in red when he is on smoke or caustic’s gas). This is a logical passive as Crypto is being constantly followed, and that may be his way of being “untracked”.
Caustic:
This one is for my boy hayhor
Caustic’s a great character if you know how to use it, I’ve came across some really good and ofensive Caustic’s mains, but Caustic although being a strong character, it’s true he lacks of a passive. I belive he could add some sort of poision to certain weapons or bullets in order to one out of an x quantity of bullets that hit s target, can make some kind of recoil of 1 or 2 DMG
I am open to criticism, so please make me know if you disagree with something and why. 🙂
Note: I’m not a native English speaker, so sorry if I made any mistakes.