Yes, Her fence is weak:
1. It's obvious and simply shoot one of the pole to disable both pole.
2. Even if you pass through, only give 15 shield damage, barely anything.
3. It only slow down/stun enemy little bit. Unless you close by to take advantage, the shileld doesn't do much.
Enhancement :
1. The pole should have numbering so you know how it's connected but enemy can't see it how it's being connected, they only see bunch of poles and have to guess.
Only other wattson know the numbering and able to destroy two poles to open a path.
2. Pole should be triggered, so enemy doesn't see it but when cross, between 2 pole, you get electrocuted.
3. Enemy should shoot both or granade both pole to destroy it. Only if destroy connected pole, you able to destroy it, otherwise stay there.
4. It should hurt at least 2 bars when running (50 damage), 1 bars when walking (25 damage)
I haven't see her ultimate yet.