If you go by 'the book' your left hand is a touch weak but if the new grip has helped you cure your hook, dont fix it.
Patching a fault with another fault, wouldn't recommend it.
Right hand grip looks fine, left is weak and the club too much in your palm will restrict your wrist hinge.
I'd get the grip to at LEAST neutral if I wanted to take the game seriously. Unless of course it's masking a physical ailment.
Describe your hook... does the ball start pretty straight then banana to the left?, or does it actually start a little left?.. or to the right? Is it a high hook or a low one... medium? Is it with all clubs or just the driver?
Starts left like a pull and then curves further left and height is medium to low
To me it appears like an out to in = pull but closed face = left spin
Mostly if i get the path on the inside i just get straight with a little left spin ( like a draw but misses to the left too much )
Fault is with all clubs
Have you got a vid of your swing that you can PM me?
Sounds like one of two things is going on... 1) you're flipping/rolling the club closed though impact 2) you have an OTT action.
I doubt you ever make it to the inside (without steepening the club a ton) and then shutting the face.