Haven't picked up the PDF yet, but I probably will tonight.
I'm disappointed that some of the Classics were not included, not because I wanted the new art (I did) but because they are some of the best units in the succession wars eras. The Warhammer and Marauder especially are THE trooper heavies of 3025. The Phoenix Hawk is also one of the better mediums as well. LRM support also gets tough with no Longbows, Archers, and Crusaders. Honestly, I would have preferred to have the sheets included, even if they just had the outlines, or the reseen art. I really think leaving those mechs out screws with the balance of that period of play. Sure we wouldn't have new Minis available for those exact variants, but we rarely have minis for every variant anyway and there ARE minis available for other variants of pretty much all of those chassis. Even if you couldn't show the pictures, I think those units are important enough that their sheets should still be there.
Still, I'm glad to see these PDF's out and look forward to picking them up. Can't let perfect be the enemy of good and all that.