Sadly D:OS2 is not really classless at all. Thanks to the armor system and the attributes, going mixed class is not really an option. You either go Str, Fin or Int and either Magical or Physical, both work heavily as class restrictions, except from buffs who are kind of classless now.

In D:OS1 you could go equally high on Str, Fin and Int and it still worked well in combat. You could mix scoundrel with aerothurg and it worked like a charm, now all that classlessness is gone.