I basically rewritten the entire plugin so LOADS of classes have changed and been re-balanced, so I can't make an entire list rn but if u have a certain question of what exactly changed for an specific class tell me and I'll let you know. Nevertheless, the biggest changes were for very op and very weak classes such as cupid (nerfed explosion + added cool down), wither skeleton (nerfed explosion + increased cooldown) and Yoshi (Nerfed eggs amount + increased stomp cooldown), Ocelot (given Speed II effect cuz ocelots are fast lel), Present (revamped class completely, now when you obtain weapons of other players u also obtain their weapon abilities), Guardian & ButterGolem & other classes with op explosion items (Nerfed Explosion damage), Wither (Buffed all damage a lil bit), Spider (Now has a chance to poison of hits, cuz spiders are poisonous), MagmaCube (Nerfed weapon and eggs amount), Ghast (Improved and buffed fireballs), SnowGolem (Given more snowballs), Ice (increased abilities cooldown), and other minor changes here and there (All classes weapons are now unbreakable, revamped the entire cool-down system so I changed the cool-down time of many classes abilities in order to make stuff more balanced, etc.)
As Trenly said, report those ares u find as a bug in the bug reports section and I'll block them