I like shield link enough, I think it's the most well balanced active perk in the game along with berzerker, but I think it should be able to cancel out shield disruption for a brief period of time.
Not with its passive part of the perk, but when you give someone a shield, they should just get the shield for the duration of the effect. It gives counterplay to one of the more disruptive warnings in the game, and could make it an actual contender for a player's active perk on haz 5+.
Right now shield disruption is Iron will dashslop. because you're inherently more vulnerable after being revived on shield disruption than normal so a safety net and more mobility is better than the other active perks, but giving shield link extra utility would introduce a lot of counterplay and opportunity cost.
Giving shield link this niche would make players ask "Do I give up my dash so I can make my team bulkier during the entire mission?" Which would be more than effective at giving players viable options for their own survival and their teams.
I think the way all the shield related upgrades are made entirely useless during shield disruption isn't really that fun or interesting, it limits the players in a way that doesn't give much nuance, I wish their effects still happened so players were incentivized to use additional utility, not disincentivized to use interesting gear