Playing devil's advocate here for a minute.
Firstly, it is presumably possible that some APT-related issues were raised during the December hearing and they won't be clarified until after APT2? The first partial APT award was issued in September, after all.
Secondly, we have no idea what has actually been raised in the APT2 arbitration, do we? Isn't it possible that there is more to it than we think? Maybe the sloth-like nature of APT2 is due to the non-availabity of the arbitrators and this is why the PL has got bitchy with them in the new rules - because it's somehow holding up the 115 case?
Don't get me wrong, I think you are very probably right but I prefer explanations that have "rigidly defined areas of doubt and uncertainty" (for those who get the reference) over those with firm conviction and the longer we wait, the more I am thinking that either the most serious matters in the 115 case have been especially closely contested, which I really can't imagine is possible, or there is something going on we don't know about ....
Probably bollocks again :)