If your team get a golden backpack and give it to Wattson the ul accelerants are eaten even faster.
Unlike the "toss and forget" potential with someone like Caustic and his gas traps : I think if you're going to play with a Wattson in your team in order to access the considerable advantages she brings you have to push for the situations where the advantage for her is strongest all the time. The teams I've come up against who tailor their game to fit having Wattson around are brutal to fight.
My friends who main her basically run teams by getting up to 3P engage distance to teams fighting and set up what is more or less a forward operating base. Team comp is usually Wattson + a defensive character like gibbles/caustic and then either lifeline for heals or wraith for merciless portalling in and out of trapped areas or through bad zone spots.
Once the above teams get either a gold helmet or gold backpack (or god forbid both) they're at a significant advantage if they can play the zone locations well as they are an absolute nightmare to push, provided the Wattson is good with positioning.
Wattson doesn't need a buff at all, she just needs good complementary teamplay.