Maybe not all right now or in the early signing period but between now and February, the only teams i can see not changing more than half their core (3+) realistically are.
But outta specifically NA again, 100T would be most likely to field basically the same roster.
EG = solid team but youd be insane to keep them all if you expect to ever get out of NA purgatory from last 2 seasons. Theyd be basement dwellers of American League with this lineup, at most anyone of Jawgemo Aproto, Boostio. But everyone is upgradeable
NRG = would also be a bottom feeder with their currently standing roster, Eeiu and Ethan would be the only real keepers. Sure theyre coming off top 4-6 performances but Tex, Hazed and W streamer are all either inconsistent or consistently mediocre.
SEN = can say this just like the other 2, current roster would be sitting in mediocrity in America, TenZ is still good and i dont see them giving up on his buyout unless he falls off the face of the earth. SicK is a huge question mark coming off his time away. Everyone else expendable.
I list C9 as a team that wouldnt drop more than half their core, simply because why would they? The chaos core of Xeppaa, Vanity, Leaf. Are consistent enough in being a top 5~ in their roles in NA to where i feel like theyre safe.