Recived replacement (third case) and it same as the second one (on video). I guess they designed it with regular 12 in mind, and not the heavy one. I don't have car mount / stand to compare (since there may be stronger magnets and it's still be stable enough), but tested with Apple Wallet at the store and that wasn't good enough.
Well, I guess I can live with that.
I still haven’t switched to my replacement. The only MagSafe item I have is the charger. Thought about the wallet for some circumstances but not if the magnets still aren’t great. So no rush to switch really, even though I did notice a difference in limited testing