I get haste and slow for enemies but still get hit by projectiles immediately after or get grabbed by dryad/charged by bear.Parry should actually stun all mobs around you, Haste you and Slow all enemies. Does that happen for you? I'm wondering if there's a bug
So you think you should be able to hit enemies while they are standing on you? Hmmm that doesn't make sense to me but let me see how other games do it.
BTW for anyone interested, you can turn on the hitbox and bodybox in Options Debug (don't turn on other stuff it crashes the game)
I think melee attacks should work the same for both non-boss enemies and players, if enemy can hit you, you should be able to hit it from same position as well. At least thats how it is in majority of beat 'em up games.