I think we just need to keep bringing up the need for a party of 6 and not 4. A party of 4 takes away a lot of the choice or roleplaying because if forces you to have the tanked fighter, spell caster, thief, cleric. Subclass that add different class abilities just aren't good enough as if having the full class in your part. Also if you wanted to play not a tank fighter but one that uses a short sword and a shield because that is the character you want to play, you can't because the one fighter you have has to always have the highest damage weapon equipped. A party of 6 opens this up for you so that you can play the character you want and not the one you are forced to need.