I don't want to sound like a Negative Nancy here, but I have been asking myself lately, how is combat really "improved"?
It is improved, because in previous games, you had to unequip shields and weapons altogether, in order to cast a spell. Now you can have a spell ready to cast while swinging your sword, or using your shield. You can also use two different spells at once, or combine the same one in each hand for greater effect, etc, etc, etc.
Beyond that, I cannot offer definitive answers about pure melee combat; mostly because I haven't played the game yet. The spell information alone proves that combat has been improved. The melee just introduces dual wielding and miscellaneous perks. You will just have to wait until 11.11.11 for more concrete evidence of improvement.