The Rebirth of Maple World! (big bang)

Does more change than I thought? It seems like a lot of classes still keep the same core skills.

Yeah, characters rely on techniques that they never did before. Outlaws rely on FT+IS to train, archers mob much more because of the removed whacking, warriors make up for their lack of speed (not so much speed but movement skills) by manipulating their push and pull skills, buccaneers no longer rely on technique to keep up invincibility, arans no longer have to rely on having 100+ combos to deal extremely high damage, etc etc.