I wouldn't do the heel inserts, that go inside the shoe. It will lift your heel out of the molded heel cup for that awesome shoe. Carni did that, said it worked good.
That initial catch position might be improved slightly, but when you rise and the load gets heavy, or slightly out of balance, your hips will go back.
Depending how your hips are built, it's better to get your knees to go out and stay high, and let your ass drop. If your knees just shoot forward a ton, your ass doesn't really get all that low. Depends on the person .
I know the plates under heels thing is obvs for squats. But try that, you may notice that your bottom position may improve, but you may find the balance problem I spoke of earlier. That will be the same thing in the snatch or clean really....imo
I guess you could TRY the inserts, and then go from there if you like it.
What I did is found a pair of used Roms on Craigslist for cheap. And then Did the cobbler thing. So cheaper. I have a relatively new pair of Roms2 and a new pair of Antas I'm very apprehensive about modifying. I did a pair of shitty Powerlift2s 2 years ago. The guy fucked up and used some squushy shit. So those are junk.
I swear to God, my heel comes right as a accelerate out of the hole. Everything will be fine in the hole, balanced, heel flat....the I wonder if there's some weird thing like my gastroc (biarticular) is lifting it ...firing it, or being tugged on when the hamstring tense.