Honestly ash's team seemed really bad before the league, a pikachu which isn't anywhere near peakchu, lycanroc which could very easily still lose against his rival's lycanroc, a rowlet, a torracat with zero grand trial experience, a little baby meltan and a released poipole who we never saw again.
But after the league, its pretty good; Pikachu defeated Guzma (who was probably THE strongest trainer in the whole league) and a legendary Silvally, Lycanroc defeated its rival (its already proved itself way before this tho so its fine), Rowlet defeated it's final stage (something unheard of before), torracat not doing too much but still showing it could take a few hits, meltan EVOLVING (a league evolution hasn't happened since Kingler) into a full blown mythical Melmetal, and Poipole becoming a Naganadel offscreen, an ultra beast which is close enough to legendaries and mythicals.
Kukui will have a harder time than we all thought