Yrden seems too strong to me. s just game winining against almost anything but SK. Maybe should affect 1 row only and reduce the base strength to 4 or 5
Personally I would like Gerald:Yrden to work like Vattier De Rideaux in NG (but without randomness). When you play it you need to pick up to 2 friendly units (logically you would prefer target damaged units) and reset them, for each of your friendly units you can pick enemy units (evidently you would target buffed ones). The catch is Yrden becomes dead card if there is no damaged or buffed units on your side of the board. If there is only 1, then you pick 1 enemy unit. This will make the card flexible to include in basically every deck.
If it's still too strong, which is quite possible, then alternative version can say "Pick up to 2 friendly buffed units and reset them, for each pick enemy unit and reset them". This will make this card a good combo with Full Moon Potion or other 2 points buff cards. You sacrifice 2 points boost to reset some heavily buffed enemy unit.
One thing is clear. They need to change Yrden somehow before the patch hit.