This season has similar issues to Legion Mate. Both are completely anime original with no manga counterpart and involve memory loss + clan change storylines with the main cast stagnating while also racking up crazy losses to complete randoms you don't care about. Fights: They mess around with the fight rules throughout the tournament/circuit leading to the characters switching up their strategies and gaining interesting advantages. A lot of jobbing takes place in this season, Misaki and Aichi brutally go back on all their season 1 development which irked me the first time around. Characters: Ren goes back to the goofy personality you saw in Kai's flashbackwhich is pretty rewarding to see after how much of an asshole PsyQualia made him in season 1 and easilly the best part of Asia Circuit. His new personality is both pretty funny and way cool when he decides to lock in. His fight with Koutei is by far the most epic cardfight in season 2.

I hated Leon so much when I first watched Asia Circuit as a kid that I ended up skipping straight to Link Joker during the finale of s2 and even skipped the Leon focused episodes in s3. He has this standoffish personality and keeps going on about the wind. The snotty child genius trio are just as bad, with how they completely destroy Q4 like bitches the first time they're fought on top of their insufferable arrogance. It's like no effort is put into making any of the new characters likeable, they're just assholes (and not in a cool psychotic way like S1 Ren) who don't get their comeuppance until it's way too late and that's supposed to be enjoyable somehow. Their arcs revolve around going PsyQualia crazed too so they're just a Ren ripoff only with 0 charisma.

Story:

Basically a repeat of the first VF nationals in season 1 where Q4 brutally jobbed only done 3 times over. Then they finally win the 4th time around. There's also a resort episode with Team Asteroid and Q4 chilling together which was nice

Overall:

IMO worst out of the first 4 seasons. Legion Mate at least had a cool climax whereas the climax of Asia Circuit is just a worse version of Aichi vs Ren. Hard to get through the first time around due to the brutal back and forth jobbing.