Controversial Opinion: Hexblade should be a Fighter subclass

What it says in the title.

These are just my opinion from the UA material

1. Hexblade's features don't interact with the base class very much.

Firstly Pact Magic creates some odd challenges because of its limited spell slots and the added spell list. Shield and Smites dominate your limited slots which make utility options painful. Secondly you're forced to concentrate on Hex to utilize subclass features which makes other concentration spells unappealing. Third a half of your Eldritch Invocations will be dedicated to supporting a melee style of play.

2. Multiclassing Fighter gives you needed benefits.

Defensively, you're a melee character in light armor, you'll want to look at a way of getting medium or heavy armor proficiency. You could lean into dexterity but that competes with charisma. Offensively Weapon Mastery helps broaden what you can do with your chosen weapon.

3. The description and flavor only superficially link to the Warlock.

First a hexblade that doesn't use a weapon is just silly, a Pact of the Tome warlock linked to a sentient sword might technically be an option but I don't see people lining up to explore it. The weapons link to the hex spell is mechanically strong but weak in flavor.

WoTC should separate the concept into a Magic Weapon fFghter and a Hag/Hex powered Warlock.