I agree on the backdrag, and for me slop is important. It's not that I spend my days working in confined spaces where swing angle is narrow. It's just that ratchets with play feel cheap and we like things that are well-designed and well-machined.
I've been intrigued by the Ko-ken and Nepros ratchets because of all the comments I've read about swiss-watch feel.
That's also why I most often reach for my 20 year old Facom ⅜" 72 tooth round-head. I like the smooth action and it feels as precise as an old watch.
Tangentially, my Williams B-52 round head ratchet (72 teeth) has the lowest backdrag of all my ratchets (most of my ratchets are Proto, with some Williams, a Wright, an SK, a Dewalt, couple Gearwrench, two Titans, a trio of ABNs... etc - I have more ratchets than strictly makes sense).
However, I think it looks like something that might be sold in a dollar store.
The design is dated, there's no swoops and curves for visual interest, the chrome is mediocre and it's as though they missed spots while polishing - mostly the inside edges. Nevertheless, I still like using it. It's got good knurling, low backdrag and a precise-feeling ratchet mechanism.
It's not my favorite ratchet - I prefer my Protos - but if asked to design a test that showed why, I'm sure it would be impossible. Some of it is the beautiful design and finishing, but Proto's "clicky" ratchet mechanism feels different too. I also like the direction lever more than the twist-top of the round-head Williams.
It's great to have videos like this one from Project Farm to highlight how different ratchets perform, but you'll miss out on the fun of discovering some of the esoteric qualities of ratchets if you just relied on the overall ranking without considering what other aspects might be appealing.