In spite of Skellige omnipresence (especially on high fMMRs), it wasn’t the most often played faction amongst Top2800 players. Nilfgaard is in a slight lead, almost 1/4 of games was played with this faction. It could be attributed to being commonly judged as the second faction, but way harder to play and less consistent (more matches required) than Skellige. Also, Master Mirror expansion introduced some new fascinating possiblities, like Assimilate decks with Braathens and Coup de Grace. On the other hand, the sentiment towards Nilfgaard amongst Gwent players is consistently observed in our stats (have a look at preceeding season stats, when the meta was balanced).
Syndicate is at the opposing pole, and its unpopularity is extremal. This faction was also least popular season before, and revisting of Firesworn archetype did not change the picture. In fact, the net effect is even negative, as other factions got more plausible options for competitve play. Scoia’tael joins Syndicate as the clear second least popular faction.