Tcl qm7

I recently purchased a 65" TCL qm7 65QM751G and I've noticed that most ppl who have the qm7 usually update to beta 18 via usb. Does beta 18 actually improve picture quality? And if I update to beta 18... will I be able to restore to factory settings if I don't like the early update 🤔 I actually like the current picture but I do feel like it can be better. I'd hate to do something to my tv that I can't undue. Any advice would be much appreciated