I wasn't talking about using Spectral Hand for Hexes but rather Spells like Inflict Wounds, Bestow Curse, Chill Touch, etc.
As for using that spell with Hexes as of now I would say it's up to the DM but the Hexes are Super Natural Abilities not Spell Like Abilities. So I would say no, Hexes and Spectral Hand do not work together.
The Witches Familiar CAN deliver Touch Attacks for them. I would guess this would apply for Hexes. Which should be added to the Description of "Deliver Touch Spells" part of the familiar.
The exception is Blight in with the Familiar AND the Witch have to touch the subject as stated in the Blight Hex description.
Most of the Witch's Hexes over all do not require a touch so to say that a Witch is weak because her hexes are rendered useless is not accurate.
As for being creamed by the Foe Melee fighter while trying to Hex him I would assume like any other Spell Caster you'd be working with the Melee Fighter in your Group to make sure your not the only shiny target that he has in mind. If you attack the lone creature with a touch (IE Getting into Melee) and no one else is near you to deflect his aggression or make quick work of it after you Hexed it then if you bite the dust it's due to poor judgement.
Lastly not using a key ability of a class WILL render that class weak. Saying you won't use a Witch's Hex because you think it's too weak and are justing using it like a Wizard, It's like saying you won't use a Bard's Bardic Music because it's not powerful enough and you just use it like a Sorcerer.