Such is unnecessary condescension.
Knowing what one doesn't like or want out of a gish is valid input, as is saying that I would find such a highly specific hook for an entire gish class (i.e., an artifically created people) to be overly restrictive, especially in comparison to other classes.
I'm not sure what you are referring to here. What did I offer? And when did this offering you claim I have done transpire?
I'm not sure if I understand what you are saying or asking here. I find your phrasing unclear.
Do you have anything other than a Witcher or WoW Death Knight rip-off?
One can peel back these ideas into something more manageable without forcing characters into being "an artificially-engineered people." It may be as simple as a monster-hunter or a rune knight.
These are incidentally ones that I have proposed to you before.
I do think, however, that the whole "warrior mages that are like Fighter/Wizards except they get their own special mechanics" can be insightful to understanding the angle for such a class. I see Swordmages/Mageknights as adopting a utilitarian approach to magic and combat, a pragmatic reality to the sort of "high magic" and "high swords" worlds that D&D envisions, along with the associated supernatural threats. The Wizard entails an elevated understanding, study, and mastery of magical spells. Likewise, the Fighter entails an elevated understanding, study, and mastery of martial combat. But the Mageknight? Forget that. Dangers out there in the world don't care about your commitment to mastering an arcane tradition or a combat style. The best way to survive and get by in such a world is a little bit of column A and a little bit of column B. Using both is practical and sensible, while neglecting either leaves one ill-equipped to deal with the realities of the world.
Moreover, their various themes would cover what issues, problems, and scenarios that such approaches are meant to address (e.g., weird magical monsters, planar threats, rogue mages, etc.) or even what their preferred methods are (e.g., runes, bypassing magical wards, magical physical enhancement, battlefield magic, etc.).
These Mageknights may be (elite) shocktroopers that kings and queens are trying to train and incorporate into their army. They may not have the high degree of bookish learning or education as a wizard, but their magical arts are turned to more pragmatic uses (i.e., warfare, defense, and combat), which allows them to get by and adapt in situations requiring either swords or sorcery. This would also make them useful mercenaries.
The Mageblade - a class in Monte Cook's Arcana Evolved (3e d20 System) - focuses a lot of their magical ability around their Athame, which is their weapon and spell focus of choice. In their hands it becomes magical, and it becomes a way to slice through magical wardings/protections, parry spells, or even slice through spells as if they cast Dispel Magic.
(One can also see how this Mageblade class likely influenced the Eldritch Knight, such as its ability to summon their bound weapon. Mearls did make a big break through writing for Malhavoc Press, both Arcana Unearthed/Evolved and Iron Heroes, so he definitely would be familiar with this class.)