Am I the only here that likes the Hexblade subclass for what it is without adding multiclassing or anything ?
I mean, I really dig the thematic of this subclass and I don't really see why some say it doesn't fit the Warlock class. I'd say this is more a question of preferences than anything else here.
Getting power from a sentient or shadowfell weapon/artifact sounds as good to me than getting from a random devil or far being.
However, I do agree that too many features of the subclass is front loaded on the 1st level and that having some merge within the pact of the blade may be a good thing...though I'd say it's more about getting the Hexblade paying for the sins of others classes (hey, paladins!) exploiting the feature to easily.
By itself I don't consider Hexblades to be that powerful. Good, yes, but not game breaking even though its other features form a nice package (medium armor, armor of hexes, the quite fitting spell list).