Fnatic - likely tired players, studied by other teams, bad map pool rn.
Heretics - very on or off team, looked good in groups but in playoffs have looked weak individually and their map pools seems bit bad because they force Icebox while looking bad on it.
BBL - top 4 EMEA team for most of the year and on good form right now, good individually and good calling/strats.
NAVI - on good form as Ruxic and Hiro are frying rn and Alexiik is performing as well. ANGE1 still good calling.
GiantX - on good form, every player is carrying their weight very equally, if im not wrong they are strong scrim team and its showing
so yeah both Fnatic and Heretics seem to be on weak form with issues with individuals being off and having weaker map pool while the underdog teams are finally looking like proper teams and on good form both team play and individually.