I have just gone through your entire thread - fantastic progress, keep going!
Are you still coming over the top? If so, a great drill I've invented (although I'm sure I'm not the first to discover this!) is putting an alignment stick in the ground at the same angle as my shaft at address and 3-4 feet to the right, so that when you are looking at your swing DTL the shaft of your club and the alignment stick look on top of each other (check out my swing thread for more details or avatar!). The idea is to take the club back OVER the alignment stick and come back down UNDER it. It is a lot harder than it looks. I've topped loads and actually missed the ball a couple of times. I can't manage to get back under the stick... yet!
If your hands are programmed to start your downswing, no amount of sliding your hips forward will solve this issue. You'll come OTT before you even think about dropping your hands. You have to re-programme your hands by really, really, really, really, really, really, really exaggerating the movement. Right now, I feel a MASSIVE loop in my swing out then in, but am still coming OTT slightly!
Once you work on this for a bit (without balls is better initially), the feeling will be that you are going to hit the ball 50 metres right of your target. That's an excellent feeling to have. It means you are starting to get there. Now, as an OTTer you have no idea how to turn through the ball. In order to get the ball to start only slightly right of the target or on target you need to start completing your swing once you are attacking the ball from the inside. It's a wonderful feeling when you get it right (or getting closer!).