for me the entire launcher is slow and a massive resource hog. The entire GUI has the same issue I had with windows 8 with everything feeling way too big and a whole lot of form over function.
haven’t tried the other platforms in heroic other than epic, it works 100% except for adding friends. You can add them via the overlay but it’s incredibly janky. Then again, it’s about as janky as it is on the actual launcher. But other than adding friends works great.
Aside from the other scumbaggery that Epic does, if you do wanna play their free games then atleast use heroic so you don’t use the wasteheap that is the epic games launcher.