You've killed us both

[Kein]

Because an ending needs to be plausible and fit within the previous events of a storyline. By that logic there's nothing (except of course the entire storyline) that says he SHOULD walk, so why can't he fly? The storyline tells us The Shadow is after him and/or the Orb, yet if this were true we'd see him taken by The Shadow in all endings, or in none; that he is taken in some requires a better explanation than "just because" or "who says he should?"

And again, I already told you - the fact that there is no direct explanation with some balloon windows @ the end of the game, doesn't mean there is none at all. And I'd mention already that the Shadow could kill him later, outside the castle or in London, or whatever. We don't know, so, why speculate?

Calling into question whether Daniel's death was actually death, is not any more helpful in this case then calling into question whether Daniel's life was actually life.

and then:

We've no conclusive proof

Bravo! Now: SPECULATIONs. Stop it. That's just water under bridge.

But if you need to conjure up that sort of deus ex machina to make your explanation work, then it is a weak one.

Lolwhat. I... need? Srsly, man, I don't need to do anything. You started all this rant, if you want some proofs - go find it.

What matters is that The Shadow 'came' for him in some endings and some not. That is the crux of the contradiction and needs to be explained.

There is NO crux. The fact that you can't or - even more correct - don't want to accept ending as is doesn't matter at all. Just uninstall the game and thats' all. I usually do it with such kind of games that I dislike. Arcania, Two Worlds...