Literally the easiest solution to not having one tactic that goes around the whole point of the mode, except you have any of the classes that counter it, which some people may not want to play (dancer range SUCKS and their lb also SUCKS, why do they have to shake so much before it works), is to make the pld in HG and the people they cover, being interrupted when attacked.
Nothing more, i know you can still cc HG-ed Plds, but it still doesn't affect covered people.
It is mostly the issue that the people they cover are immune to pretty much everything, not the pld themself, since cover cheese was always a thing, guard just made it worse.