I use refind also, there should be a setting somewhere to let refind scan entries from other EFI partitions. I have that setup and just created a second EFI partition for my Linux setup, so that Windows has no idea Linux even exists. I even have everything running off of the same drive (my laptop only has one nvme slot) and I haven’t had any issues.
I don’t think I’m alone in saying “light” and “well-optimized” are not words that fit the Windows 8.1 experience.
Mediocre in almost all aspects is the best descriptor for 8.1 and honestly that’s pretty generous given how bad 8.0 was