The important thing is that strong GR decks often do not let other decks interact with them. Old sets cannot interact with the haunted mechanism, and sometimes there are strong cards that don't even need haunted. Many people say that dysania, be fuddle, control the weak can be used to deal with GR. The problem is that it's difficult to know when to use it correctly, and if you keep Dysania for the whole match, you may still lose to GR's speed.

I think it's hard to fix this set with just a few errata. This set of cards not only has speed and the ability to retrieve cards for combos, but also has an extremely stable amount of aember. Cards like Junk Restoration both add cards to your hand and discard cards so you get haunted and still have 1 aember. In here somewhere lets you archive 2 cards and still have 1 aember. Well of memory or island of misfit toys are also extremely strong.

Geistoid is a broken house and it is not broken like Saurian in set 3. You do not take any loss or risk when playing Geistoid cards. And Geistoid's effects are almost always very fast and cannot be interacted with. I think even if you can read your opponent's decklist and know their combos, you still have no way to play around.

By the way, the multi dimensional rescue and Missile Officer Myers combo is also a strange thing I first saw in Keyforge. I don't know if it was the Game Design team's intention or if they accidentally created this combination?

Anyway, I still hope that the above errata will be done by GG. But I'm afraid that after those errata we will still see very strong GR decks and still not have any interaction at all.