I have been playing and practicing with the grip as per the video @TheDeanAbides @iacas. That alone has actually improved contact a bit which is interesting. I have switched to interlock for this - it feels a little weird as you'd expect I guess but it's easy to implement. I actually played two rounds with it and scored fairly well - 79 and 83 at a tougher course, both score differentials of around 8-11 which is roughly where my handicap is these days. The weird thing is that 83 came with an astronomical amount of putts, which is unusual for me as putting is a strength - I think I counted 40 putts for crying out loud - so a bad day at the office in that dept, usually average around 30-33, so what could have been scoring wise. I actually think even just focusing on stuff has helped me tremendously already instead of aimlessly searching.
The ball flight starts left and draws now, there is no fade/cut at all. I wouldn't necessarily say it's a big hook, it's just a little draw/hook but it's not starting in the right direction so it's a little offline. Low point still sucks which tells me there's not much compression sometimes so I must of course still be flipping which I guess you would expect.
Going to work on the set-up stuff this week, including ball position, the wrist hinge and trying to keep the head on the ball. It almost feels like the head comes off and away because it has to do that for me to get the 'over' rotation. I will get some fresh videos after I've done this work and see where things are but it's nice that even just with a little focus that it has instantly improved my scoring, just shows what can be done when you are not aimlessly searching around.
Appreciate the comments @Valtiel and I understand what you mean but years of doing this is going to be hard to switch. But if I want to keep exploring becoming a ball striker and getting as low as I can then needs must.