A more charitable description highlights that Gibson is more literary than the authors you're comparing to. He has an artistic flourish to his wording, and he's very good at it. This isn't to detract from your main point.

It's interesting to think about that in Stephenson novels (I don't wish to draw too deep a comparison, but many make it between Snow Crash and Neuromancer), it is interesting to note how deep Stephenson dives to build his themes. In some places it's a subtle framework, in other places it's... very noticeable, as you allude to!