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.
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.