It's not a big deal, so let's lay off the name-calling, shall we?
Name-calling?
This begs the question, then, of what criteria (explicit or implicit) people have for judging the quality of a fan explanation like this. I honestly don't know -- my "inelegant" comment was a gut reaction. I'm trying to understand why I didn't find it as interesting or useful as, say, why John Watson's middle name is "Hamish" (one of my favorite fan explanations for a canon discrepancy). We have reasons for preferring some explanations to others, and I'm curious if we can suss out what they are.
I still like the idea of Nikolai Rozhenko's middle name being Simon, but that's neither here nor there.
I'm mostly of a like mind with
Timo when it comes to these sorts of things, but when it comes to "elegance" in the hypothetical setting it really is a difficult thing to quantify or even qualify for that matter.
I tend towards to simplest solution to any given situation. But the simplest solution is often the most boring one and given that we're speaking of literary fiction, boring often doesn't fly too well. But make it too "interesting" and it can all too easily become convoluted and implausible. (See: the case of Darth Vader vs. Luke, Lea, Obiwan, C3P0 & R2D2).
For me, elegance is a fine and reasonable balance between wacky absurdity and simplistic mundanity. Is it a coincidence that 2 characters named Worf happen to be related? Sure. Is it an instance of the small world syndrome? Sure. Is it plausible and elegant? Given the circumstances, IMO definitely , and if you've read
Art of the Impossible it's also good writing when it's in the right hands.
Is it plausible and elegant that crewman Dax from STVI and the symbiont Dax are related? Given the circumstances, I would say no. What are the differences between the two situations?
Given the circumstances surrounding T'Pau, is it more plausible or elegant for it to be a completely random separate person, or for there to be some manner of connection between the two? It's a judgment call.
What about real life? Is it plausible and likely that John Addams and John Quincy Addams are connected? Sure. How about Theodore Roosevelt and Franklin Roosevelt?

Look a little closer at Eleanor, you might be surprised.