Don't be so doom and gloom man, hard to see the forest when we're just getting pictures of the leaves.
The game will be different, but i wouldn't start making any drastic definitive statements.
Yeah, sometimes I'm on the worse side, but think this that way. Units, unless stated otherwise in a massive FaQ, will continue on their current unit sizes and horde bonuses won't apply. Which means, Saurus wont have 2 attacks on their clubs/spears and Skinks will barely shoot. Unit size for both of them is currently capped to 30, as you can only invest 2 reinforcement points on battleline units.
I'll talk about Seraphon, as they're the only army I play. Almost evey unit we use to deploy is paying extra cost. Sallys x3, Terradons x2, Kroxis x2, Skinks x4 or screens of MSU (which are now worse due to coherency), Saurus x2 or x4... And so on. Meanwhile our efficiency went down.
The last game I played was against Vampires. I used a FoS list with 3 Sallys and a blob of 40 Skinks with a Priest and Starpriest. My friend had 2 units of 5 Blood Knigts; one of them faced my Sallys and the other one my unit of Skinks. The unit facing the Salamanders had 3 casualties on first turn and the one facing the Skinks had almost 2 casualties and 2 wounds. Next turn, he charged my Blob and I survived long and good to hold the objetive they were in and the Sallyes died because a double charge (my bad) but not without wipping one more Knight.
My point is, what do we have, if we are not longer allowed to have a blob, to counter things like these? Math wise, a MSU Blood Knights deals 10.76 Wound to 4+ save (any behemoth or Saurus MSU). Yeah, we can screen the hell out of our army, double and quadruple screens for the same price until a Stegadon comes and kills the 5 Knighs next turn, but are we playing AoS or chess?
I know this is a strategy game and most of the time I play like chess, sacrificing a unit hoping RNGesus bless me unscathered and not a rival's double turn so I can counter him next time.
TL

R. There are better units in MSU than others and that´s a fact. We barely have something to counter an elite unit like a Varanguard or Blood Knigts 1vs1.