That's not a citation. That's an assertion. Because-
1. You don't actually supply any data; and
2. You don't know what the internal numbers and deliberations were; and most importantly
3. The people who were part of the playtest were not "fans" of 5e (because it was a playtest, not the final game). They were a subset of players at that time, and they are a miniscule amount of the people playing 5e currently!
The 5e Fighter is what the plurality of 5e fans want in a fighter. It however isn't what the majority of of 5e fans want. There are possibly 3-6 different types of nonmagical warrior class people want.
Again, citation needed. Do you have any actual data, surveys, numbers? Or is this just an assertion?
In addition, there are already
three non-magical warriors; the fighter, the barbarian, and the monk. So if you're expanding the ambit of your idea to warriors, you also have to include those archetypes as well.
This is why almost all the major 3PPs who produce player content has a fighter variant, a new warrior class, or a fighter subclass that leans on of the knobs heavy in one direction. Because they all know there is a market. Even WOTC is sorta doing it.
Um, when a 3PP makes
any player content, they are going to make a variant of the already-existing class. Because that is, by definition, what 3PP variants are. They aren't going to publish
the same thing that is already published by WoTC.
Look, I get it. We all think that our own preferences are more universal than they actually are. But just because you want something, doesn't mean that either (a) it's going to happen, or (b) it's what everyone else wants.
I want Bards excised from D&D with extreme prejudice. I want spellcasters nerfed so hard, they won't even see the next nerf hitting them. I want much slower healing ("gritty realism"). I want WoTC to just put out a Greyhawk supplement already. I want them to release a real psionic class, maybe based off the last decent iteration of the Mystic.
There's a lot of things I want, but I don't presume to speak for the D&D community or believe that my preferences are the same as all of the D&D community (or even the majority of it). To the extent I want things that WoTC isn't providing, I can either-
1. Do nothing.
2. Use 3PP.
3. Homebrew / houserrule / optional rule my way around it.
But I don't insist that my preferences are universal. As I have written before, some people like wuxia fighters that leap hundreds of feet in the air and smite titans in their face with their 20' long swords, and other people want grounded and realistic martial characters. There's no wrong answer.