I know it's a pain in the ass but when they start to dig up the 27L hold (soon) it will all start to make more sense.
Strangely enough, the worst part of it is routing to 27R if you have crossed at S3. The rest vaguely works... Main problem is that as it has all been designed to Code F (A380) separations, it means that the signage is all very spread out making navigating the taxiways even trickier.
If in doubt, ask. I'm sure Gonzo is happy to help
P7