Neonchameleon
Legend
The thing is that with adding new classes there is also a cost. This cost is paid by everyone who comes to the game fresh and gets lost in all these classes. It's paid by a whole lot of DMs who need to know what their PCs can do. In short it's paid by those most vulnerable. And 5e has been very disciplined about not adding to the burden of the number of classes in the game, and it's one of the things they do well. By adding a class that would make some people have a better experience you're also adding something that would make a lot of peoples' experiences slightly but meanignfully worse.Because people would enjoy it and want one. That's why you would have a paladin class. And without it you would see the same as with the swordmage in 5e. You would get threads on a regular basis asking for it, and you would get people saying we don't need a paladin as you can make divine martial caster person with xyz subclasses and multiclassing. And none of those combinations would offer the experience in the same quality that the actual paladin class does, as every one would carry thematic or mechanical baggage, or miss the things out which actually define a paladin.
The call for the Gish appears to not be "we can't mix spell and blade" because as mentioned there are at least half a dozen methods of doing so using different subclasses. It appears to be "I want this one hyper-specific class ability" (spell strike). For which you want to make everyone else put up with adding an entire class to the game. It's not, unlike the Warlord, a concept with almost no meaningful support. It's a hyper specific implementation that isn't on the list of things a newbie would be looking for.
Could the Eldritch Knight and the Pact of the Blade be higher quality? Definitely. And I hope that the 2024 version of the PHB does overhaul a number of classes (and makes the Tasha's Ranger the default). But when what's missing is one single class feature that appears not to be a reason to add an entire new class to the game.