@MonhulioCaustic gas isn't supposed to finish the job itself, It's purpose is to make the enemies inside it a lot easier to kill since they are slowed, have a distorted vison and continuesly take damage. if an enemy walk through it for even just 2 seconds you are supposed to take advantage of that and deal the best damage possible. As for Wattson she doesn't need a huge buff she is already good and picked a lot in ranked/tournaments if I would change anything about her I would just increase her pylon shield recharging rate little bit.
@SERPENT_DESCENDCaustic is best used in a zoning/crowd control role, gassing enemies should be done opportunistically rather than your main role. Focus getting enemies into the open, away from cover, at your preferred range. See the gas like a molotov in CSGO, rather than a weapon.
Only use your gas on enemies directly if they are cornered or stuck in one place. The exception is your ultimate, if someone tries to push you, anticipate them and throw it right under their feet just before the fight begins to secure that 1v1.
