i used the vulkan dxvk mod cause it gives a performance boost but it drops the framerate to as lows 5 fps randomly when i play on 1080p. So I had to compromise and use 768p instead. and i am not a streamer.
still to this day, you can't remove thumbnails once you chosen one. You will always have to choose one and not the default one which i prefer now.
i haven't streamed this game before cause it is so unoptimized so yeah sudden crashes might happen or slow downs.