First, a history tour.
Elementalist is the most hated class, due to its third trait. It stuns, freezes, entangles and burns a random enemy on 4+ matches, which usually means that the entire team gets bogged down unless impervious. Bogged down actually isn’t quite that bad, while it cripples skull based teams it still allows collecting mana and casting spells.
Dissonance is the most hated design idea that never came to pass. It’s a trait that silences a random enemy on 4+ matches, which usually means that the entire team becomes entirely useless unless impervious. Silence beats anything Elementalist does by miles, because all a fully silenced team can do is make gem matches, which don’t do anything because silenced troops can’t collect mana. Quite thankfully, Dissonance was considered way too toxic to ever get released.
Second, an observation.
The upcoming September mythic is currently planned to have a trait that curses and silences a random enemy on 4+ matches. Curse not only means that silence will pierce all immunities (except invulnerable), it also makes it next to impossible to get rid of silence again. This is basically Dissonance on steroids, it can even shut down teams right at the start of the battle, for the entire battle.
Third, a prediction.
There will be a shitstorm of never before seen proportions in a bit more than a week. It won’t take players long to realize it isn’t fun playing battles where you can’t do anything other than passing your turn over and over again. Against goblins, you can at least lean back and hope you’ll get to do something after a minute of extra turn spam. For this one, you need to keep making moves for the battle to progress, and each move will do absolutely nothing.
There will be some harsh nerf to make Gems of War playable again. Which will just fuel the shitstorm, because just about every player will have spent a fortune to obtain that troop, using saved up resources and real money. The official stance will be that no matter how useless the troop is after the nerf, it’s a “sideway change that doesn’t warrant any refunds”. And since “everybody has received so many other fantastic low rarity troops as part of opening thousands of chests”, it would actually be “a disservice towards players to roll anything back”.
Fourth, a recommendation.
Change that trait to curse and silence a fixed troop on 4+ matches, either the front one or the back one. Before it releases.