[DonRotolo]

To speculate on what is and is not legal for 2014 BEFORE the rules come out is pointless.

That being said: Once the rules DO come out (Saturday), READ THEM because they will answer ALL your questions.

Asking on CD "if something is legal" is also pointless: We are not the GDC, what we say has no value at competition. If the rules really don't answer your question (read them again!), then your lead mentor can submit a question to the GDC via the FIRST website.

THAT being said: Wire things as shown in the diagram. You won't save anything by daisy-chaining grounds, and you WILL increase (electrical) noise, complexity and reduce reliability and repairability. Bundling wires is OK, as is the use of connectors. YMMV depending on the rules though...