With the Go Rush! World launch tomorrow (with the potential for a Speed Duel Selection BOX as well) This Tier List is more or less a post-KCC Banlist snapshot restructuring of how TPC feels about decks at the moment. Next week we'll have a more definitive picture before onboarding the next season of TPC.
Tier 1
With the nerfs to Star Seraph, Borrel Link and Lyrilusc remain untouched, and barring a new content injection or targeted adaptation, will most likely remain at the top for the forseeable future.
Tier 2
In the KC Cup, Fleur's niche in the metagame has been creating an easy-to-execute "functional FTK" by making Loading... . While the Extra Deck expansion has allowed most decks to adapt to Bishbaalkin with cards like Loading... , TPC still has confidence in Revolution des Fleurs consistency and firepower.
In the last KC Cup, Sky Striker came out as a strong and consistent counter to Star Seraph (the number one deck at the time). However, since its best matchup has since been nerfed (putting Lyrilusc, a worse matchup, in a way better spot), Sky Striker isn't as much of a meta-breaker than it once was. The strategy is still solid, but its unfortunate Lyrilusc matchup is looking to be at the forefront of this upcoming meta.
Star Serpah received a significant hit with the recent banlist. The addition of Loading... (which does wonders in both the Lyrilusc matchup and matchups against the more fragile Rogue decks) boosted Seraph to "best deck status", with how consistently the engine can access techs, and its removal will have an obvious effect on its winrate. As such, the deck is suspected to fall from favor.