I think it was silly for people to expect whole new units for the Fyreslayers update. Look at Skaven, FEC, and BoC. All got new tomes, spells, and terrain. That's about it. Skaven and FEC each got one new hero, but I wouldn't consider those game-changers. Old armies are mostly just getting rules updates so they can compete with other factions. Doesn't mean they won't get new models in the future, but right now we're in the "Elevator Arc." Gotta get everyone on the same level before we start doing anything truly crazy with them.