Hi! I'm new here and recently wrote a ReShade add-on that renders LiveSplit directly into (fullscreen) games as part of ReShade's OSD. You can find it here together with its source code: https://github.com/mleise/livesplit_overlay If you are wondering, what benefits it could have, I wrote down the rationale behind it in the README right on the same page. Input lag could be a big one for some, as well as GSYNC/FreeSync. Be aware that I copy the LiveSplit window into GPU memory as is and alpha is handled quite differently, and if you are used to low alpha showing as black or turning off font anti-aliasing, results can be ... interesting. If you see a frame around the overlay, turn on ReShade's FPS counter or the clock. That will make it go away. Anyways, it's one more tool in the shed that I hope someone finds useful!
Happy speed running and best regards, Marco