Honestly I’d nerf her Halt. The spammable shield if okay, to me; she is an immobile tank with a comparatively tiny health pool so theoretically you should just be able to manouver around her shield like we did for the past two years.
The problem is that she’s now being played with heroes that can delete you in .004 seconds. Now, most of those heroes are heroes that have traditionally been countered by positioning–that is, not getting caught somewhere where they can wreck you–but guess who has an ability that can deprive you of your positioning? Oh yeah. So you get pulled out in front of a Bastion or a Hog and that’s that.