i have installed and opened plasma waylaid session, but the cursor was moving very slowly and in a descret way. kwin_wayland was eating 100% cpu. connecting with gdb has shown me that this was happening due to endless QSGBatchRender loop started from kwin5_aurorae.so So solution for me was to switch to breeze window decoration. but an average user might not know this, so please just ban kwin5_aurorae.so when running under wayland. fixing the original issue might be good as well, but i understand this would take time.
We fix bugs, we don't workaround them by blocking components. If Aurorae has a problem, we need to know about it, then we fix it. Given the other problem reported by you, I rather think that you have a problem with QtQuick under Wayland.