Most Seasonal modes are built in a way that only 1-2 decks will ever show up if you want to win. Most of the time it's some scummy Nilfgaard deck, now with Trial it's Northern Witchers… and that's it. If you go against that deck and aren't playing the exact same one, you might as well auto-concede.
I guess my biggest problem is that these modes have been around forever. There have been no new ones added, and there have been no changes to older ones to balance them. I wish they would add ones that encourage a wide array of decks. I think a really cool one would be a Seasonal mode that allows you to create a deck from two factions instead of one. But I'm sure there could be dozens of solid ideas.
I dunno, I hate playing Ranked because of how the meta is. The mode that replaced Arena, whatever it's called, feels awkward and like you have to get really lucky. So I play Seasonal for the most part, I just wish CDPR would devote at least a little bit of attention to it.
Source: https://www.reddit.com/r/gwent/comments/v25p2f/i_know_this_isnt_on_many_peoples_top_priority/