Dr. Awkward said:
However, this isn't the case with names like Mystic Theurge, which sound like they mean something, but don't. Golden Wyvern refers to an implied (but apparently not detailed, according to Mearls), organization.
I doubt it's an "Organization". I really do.
Okay, let me put it like this.
Is there an Organization of Tai Kwan Do? How about an organization of Kung Fu? There are schools that
teach Tai Kwan Do, and there are Masters of Tai Kwan Do, but there isn't a building somewhere that says "Tai Kwan Do Headquarters" or "Official The Tai Kwan Do School"*.
If that's too anime, then we could just talk about fencing styles, or whatever.
The point is: It's not an organization so much as a style, a
tradition that emphasizes this or that. So you can have the wizard out in the middle of no where who teaches an apprentice, but he teaches him Golden Wyvern because His master was a Golden Wyvern and his... It's a list of techniques, and likely little else.
*This is different for Shaolin kung fu, because it's trademarked. But I hope you get my point.
That's why the Mystic Theurge was a better DMG inclusion than the Red Wizard was. The Red Wizard comes with a bunch of organization baggage that takes more dedicated effort to remove, since many players think they know what a Red Wizard is supposed to be like, having played or read FR material. And that organization isn't even a core organization. If Golden Wyvern is in the core books, it'll be more difficult to divest them of the association with the implied setting organization.
See, that's where I feel your argument falls flat. I just... I fail to grok that "Red Wizard of Thay" = "Oh god it's an implied setting". It's
a PRC. Just call it a Red Wizard, or use the mechanics, or
something..
How many times are you referencing 'Red Wizard OF THAY'? Even if that's your PrC, you're not at every turn saying 'Hey, I'm a red wizard of - oh right, no Thay'.