Heck, I wouldn't mind smaller, tighter and more numerous 'classes'. Probably classified by general gameplay aesthetics (i.e. guys who fight in melee in this chapter, guys who fight at a distance here, guys who support here and guys who do lots of skill stuff there) with a mix of martial and magical. You wouldn't have a 'Fighter', you'd have ten levels of 'Knight' and 'Ravager' and 'Blademaster' and 'Whirlwind Dervish' and 'Duelists', while on the caster side you'd have the 'Pyromancer', the 'Illusionist', the 'Necromancer', the 'Witch' and so forth. Ideally, all these mini classes could fit in a two-page spread.