Firearm design hardy changes over time. Yeah sure. That's why an 1851 Navy revolver looks exactly like a Sig. There are thousands of firearm designs spanning what 200 years?
Haha. Point taken.
I'm not trying to persuade you or anyone else to agree with me. I'm just explaining why I, personally, don't like it.
Whereas the weapon slide/upper may follow the action/mechanism the grip itself is a different matter and that's where I have a problem with Luv's gun.
Grip design is informed by ergonomics and/or the need to accommodate a magazine. The sig grip is different because it takes a magazine.
Luv's gun has a grip screw in a place that suggests that it's not a magazine fed gun. Without a magazine only ergonomics would dictate the grip shape and I would expect it to resemble a kind of revolver grip. In a lot of anime type gun designs they take a pure aesthetic approach and create something that looks like a hybrid grip - basically something like an autoloader grip that's so excessively sculpted and contoured that it couldn't possibly accept a magazine. Luv's gun isn't as excessive as, say, the Japanese Seburo resin guns but it does have more in common with those style anime guns which are all about aesthetics over logic.
Luv's gun looks just like an anime space gun to me.
Similarly the lack of stippling or checkering on the grips also make it look more like a toy than a real gun. Why wouldn't a gun have stippling/checkering?
On the other hand, at least K's gun has plausible grips.
To take your example compare the grips of the 1851 Navy to a modern revolver, say a (my) S&W TRR8.
Your initial point was about the evolution of
aesthetics. Grips evolved, not for aesthetic reasons, but for improved ergonomics and function. If anything Luv's gun looks like a big step backwards with ergonomics.