It would've been nice if the future Volume 3 will combine with a Class 57 pack instead of special/one-off liveries so as to not only slim down needing to purchase multiple products but also tool the mechanics into the same bodyshell, but I doubt that'll happen.
One thing that does irk me with this new pack, and like some of AP's items, is that the 47 only starts from the late 1970s onwards instead of including the early, pre-TOPs variations in this Volume 1. It can't really be that exhaustive of the details if all but the earliest variations are there. The 37 does this, the 40 did (until that got removed), the 50 does (albeit not quite accurately), but this doesn't, the 4CEP/4BEP doesn't, the 86 doesn't, the 31 doesn't and the 87 doesn't.