Is it me or do these mech-like enemies have the unversed symbol on them.
Also, one thing you forgot to mention is when Sora and co. are falling towards the driveway, we see around the left corner of the screen a pink trampoline. This could mean you could use it to jump back to the roof at any time.
If you compare the symbol to an Unversed symbol, you can see they're different. Most likely just a design for the Gigas that doesn't mean anything significant.
And thanks for pointing out that trampoline, I'll add it to the analysis!