I bought it too, basically just for Tealove. While I noted all of the left out/misrepresented entries, I also noted that a lot of prototypes seem to have made it into a format here where they can at least be examined in a somewhat larger style than the tiny pics on the side of a wave case.
Did you notice all the stallions in wave 2012-1 (the 1st wave w/ boys) not only look hand painted but also have a different head mold?
Did you notice how the princesses in wave 5 look pearly? I suspected this from box pics but they were so tiny it was hard to be sure.
Did you notice how several eye-prints in the later waves are looking in different directions than the production pieces? Including not-grumpy Groomsby?!
From the amount of hand painted looking ponies and eyes/CMs that are decals, I think a lot of prototypes or pre-production models got in here. Which is at least one boon for a guide that fails to be a true collectors' guide!