If it was just a "port" I would have agreed with you.
"Remaster" would be a better term.
Although it's still not much better than a straight-up port. At least not when they're releasing one for full-price, while other companies are releasing multiple remasters in one package for less money. Just look at Kingdom Hearts. Kingdom Hearts HD 1.5 ReMIX contained KH and KH:Re:Chain of Memories, HD remastered like WWHD AND with a fully redone OST... For $40.