The PHD (Post Hole Digger) is one implement you will not be able to use with your Quick Hitch. You will need to remove it, so then the extendable lower links might be pretty handy. Post Hole Diggers are reputably a PITA to hook up anyway, unless parked just so to make re-hitching easy. Even then some complain about them. If you don't have or don't contemplate getting one, then the Extendable lower links or even the telescoping stabilizers don't have much purpose. I use them all the time, but then I don't have a quick hitch and nothing I have is QH compatible anyway. I also don't have TNT, though I have contemplated getting that several times. But I guess if I have lived without it this long..
Fixed lower links and turnbuckles are in themselves a big PITA but that all goes away with the QH.