A revelation of a mysterious element of the game which is not revealed in any of its marketing material is a spoiler. The fact that you believe it's a "decent compromise" doesn't enter into it. The proper disclaimer for your comment would be: "Spoilers, but I think these things should be spoiled."

I played the game years ago and did not have this element spoiled, and I thought it was presented at exactly the right time and in the right way. I'd go so far as to say that if somebody is so frustrated by that early mystery (which you're all but guaranteed to understand better and better as you play) that they quit there, then the rest of the game will just be an exercise in misery. It's a puzzle game. The developers put settings in place to cut the flight mechanics out of it so people could just experience it as a puzzle box instead of a flight simulator as well. What they did NOT put in the game is a hint about the thing you're spoiling.