One thing that's just bothered the hell out of me since the playtest, and that remains in Basic, is that the Fighter's 'protector' feature allowing you to protect your allies, but it requires you to be holding a shield. Not only does it not make sense (a sword in your enemy's face is just as Disadvantageous as a shield, is it not?), but it means that, RAW, you can't actually protect your friends if you're, say, a greatweapon fighter, or dual-wielding. I suppose you could say the cross section of some swords is too small for some types of attacks, but there's no reason someone with a Great Ax couldn't cover a friend if a buckler would also suffice.