Make it a taser dart, then no-one can say it’s not fair.
But trappers should be able to shoot through a horde (even if a net is a bit wonky). That’s the purpose of a horde. To pin you in with body mass, so you can’t dodge a special or elite big hit.
Shooting through friendlies I think was an unnecessary change. Part of the skill of an Ogryn was knowing to walk along the sides. Part of the skill of other classes was knowing when to let go of the fire button.