You think 75-90% of the Eldritch Knights power comes from the non-spellcasting base fighter? You think that Maneuvers are only 10-25% of the Battle Master's combat ability?
For the EK it's close to 90%
1/3 caster? your evocations never threaten level appropriate enemies. Your abjurations do little at the levels you get them as well.
Canrips? The only thing good about EKs
Weapon Bond? Ribbon
War Magic? A buff to the only thing goodabout EKs: cantrips
Eldritch strike? Your attack spells suck when you get them so...
Arcane Charge? Buff to base fighter feature
Imp War Magic? Your attack spells suck when you get them so...
EKs, Chmpions, and Battlemasters are fighter first. That's why you say...
The base "fighter" is vanilla milk toast. There's nothing there to define it. Not even Action Surge is a defining ability, and it's the best of the three purely base fighter abilities.
I feel people are looking at the image and not the mechanics and play. The EKs in the game I DM and the game I play both sparingly use their spell slots as they have little impact. Our Battlemaster is know more for his Action Surge and Second Wind over his dice and maneuvers.
I'm not using it as a PC class. "Fighter" is just short form for a man who fights, or fighting man classification. If we're classifying men who fight as fighters, then the Ranger, Barbarian and Paladin classes need to go. Those are all just variations of men who fight.
But this discussing is about classes.
Man who fights isn't a class.
If you attempt to put Fighter, Barbarian, Ranger, and Paladin under "Man who fights" as a subclass, you are just renaming class to subclass.
Should 5e have more classes? Maybe. Not every big concept, fantasy adventurer archeype is in 5e as of now officially.
What 5e doesn't need it big concepts shoehorned into subclasses or simple archetypes spread into full classes. I don't think 6e needs that either.