Been playing for 2 years now and I do feel like the addition of this certain create card has created a scenario where you get a free asspull card any game. It's so prevalently used at higher ranks that it just seems like a problem.
While I don't have a problem with any create category card, one that allows you to pick any card you want from your deck just seems problematic. Especially in a meta where one cards can make or break any match. I've had one too many matches where victory was assured until an Echo was used to pull an instant win pointslam card out at the last second (Viy, Aglais come to mind)
It might also be an issue with the meta being so reliant on singular cards that can accomplish that instant win scenario unless extremely specific counters are prepared. I feel like if Oneiromancy/Echo was removed as a card the game would be a lot more fun. Just my two cents.
Source: https://www.reddit.com/r/gwent/comments/18bwqj2/opinion_gwent_would_be_a_lot_better_if/