And the early MGL too? I don't think that we were lucky with this at all.

The SoZ was of marginal utility. By the time it got into the game, we were already building MDIs. Besides we weren't the only team to capture it. It's almost half-expected that you will if you are careful.
As for the GLight, it certainly had its uses. However, there was a big downside too. Without it (and the early MGL), we would never have hatched our mad scheme to take out France before guns, when it turned out that we didn't even have to. Had it been necessary, it would have been a major coup. But it wasn't.
As it was, we lost time taking down nearer targets like Egypt and India. We also had the considerable cost of hanging on to a leader for (what?) forty turns.