Glad a spotlight topic has been created on wattson, should be ready to unlock her after a couple more games!
My opinion is based purely from an enemy perspective, but here it is.
Contrary to all the negative feedback i've seen about her fences, it seems the mistake watson players are making is to place their fences in such a way that they can easily be destroyed. I'm constantly seeing this in matches thus making the fences a hindrance for no more than a second as they're easily destroyed when exposed.
Her ult is a real nightmare to deal with when used properly, especially when the watson squad contains a skilled gibby user due to the overwhelming defensive advantage her gains.
So yeah, she seems to be a great support legend and i'm pretty psyched about unlocking her. :D