I'll start it off however I only have time for a couple before leaving for a few hours.

A:
High speed has been added, i.e. GMLAN.
Battery voltage is now present which removes the need for external power for scan tools.
Signal ground is also available to verify voltage output. ??


C: After test is passed 3 times MIL will be turned off but DTC's, FF and FR will stay in memory until the 40th cycle with no error.

I'll try for more when I get back.