Yo yeah I'm having the same issue with the pop-out windows being laggy. But I don't have AMD Graphics I think? Not sure though I have Intel Iris Plus Graphics 1536MB if thats what you mean
Alright thanks for the reply. Sorry you're running into this. If you could open MiniMeters, click CMD-D and get me a screenshot of the that screen it would help a a lot. I'm trying to figure out a way to replicate the issue here since none of my Macs are exhibiting this behavior.
Also the 'Legacy Versions.zip' includes older versions that you can use in the meantime!