I wasn't aware that this thread was an attempt to get WotC to fix anything; didn't we start with the premise of "how can you fix the game yourself?".
This whole side debate about what WotC could/should/won't do is irrelevant. Also irrelevant is this burning need for a "mythic martial" to make sense and not have a bunch of random abilities. Lots of classes have random abilities. Just look at the Monk! The subclass designed to "throw hands", The Way of the Open Hand:
"Monks of the Way of the Open Hand are the ultimate masters of martial arts combat, whether armed or unarmed. They learn techniques to push and trip their opponents..." Mhm, sounds good so far.
"...manipulate ki to heal damage to their bodies, and practice advanced meditation that can protect them from harm." Eh, come again? I thought this was the Bruce Lee subclass, why do I have a shabby self-heal (I can heal myself for 3x Monk level; the Paladin can heal anybody for up to 5x Paladin level, and deal with poison and disease) and the ability to "cast" Sanctuary?
Now someone might say "legacy Monk abilities!" and I'd say "should be in the main class". They might say "martial arts movies!" and I'd say "if these abilities belong here, why does Way of Mercy exist?".
Not every class or subclass has a very good unified theme; in fact, the Fighter currently has one of the weakest themes in the game! I mean what is their theme? They "fight good" in a system where everyone fights good? They can use all weapons in a game where anyone can get martial proficiency from a subclass, even a Wizard?
You want to talk about random abilities? What does "short rest self heal" and "1/day reroll a failed save" have to do with "I'm a professional soldier/gladiator/mercenary/man-at-arms?". Shouldn't we have some kind of weapon specialization or tactical ability in the base class? No, what we get is "attack more times".
But somehow, to perform at a level above this, we need some kind of "story". In a game where creative people can reflavor things to create their own story! Never mind that the Sorcerer exists, you know, the "somehow got powers due to being the son of a dragon/god/demon, an ancestral curse, touched by Vorlons" class. Or how about the Warlock, the "bought magic from a shady guy in a back alley" class?
Or hey, we can pick on the Ranger, the "I'm kind of like Hawkeye (no not the Avenger. Or the Doctor. I'm talking Last of the Mochicans)/Aragorn/Tarzan all in one class! I have vague Druidic magic, maybe an animal friend, maybe I'm a great archer, maybe I have great powers when skulking about in darkness/maybe I dual wield/maybe I'm good at woodsey stuff!". And you want to talk about random abilities, jeez, just look at the Hunter Conclave and ask why Rangers have Whirlwind Attack and not Fighters!
So yeah. Flavor is what you make of it. I would expect a DM to come up with the flavor for their own campaign. I mean, do we not let people play Rune Knights because we don't use Giants in our campaigns? I would hope not!