It is true that melee could get a little buff. I did liked the Cleave action they added to great weapons, cause it allows you to hit multiple targets at a time and act as crowd control but it can only be used once every short rest and it seems to nerfed compared to the power some casters have. Also the opportunity attack areas seem too small, taking into account that when we play D&D the area a melee character can control is 15 feet wide.