Now, this doesn't actually make sense, because Pact of the Blade Warlocks could always get Extra Attack through the Eldritch Invocation: Thirsting Blade. Additionally, they don't mention anything about using your Charisma modifier, which is *the* benefit of being a Hexblade...
There is no way this is real. Absolutely no way. It's a dead pact without the extra attacks and using the charisma modifier.