Blizzards are too expensive and aren't doing enough damage
Sure, alone killing 80% of the infantry with, on the max, 2 shot (1 medium armored if they stand still), damage in line, and leaving some frost air on the ground for some time, doing heavy damage specially for infantry, plus the speed nerf applied for their targuets... without forgeting the good range. There is no way that this unit is good vs infantry...
Also, adding some extra Blizzards on the mix they can even face enemy armor.
Well I mean that they're too expensive and don't kill Infantry fast enough IMO, rather use SEALs or GI's with Tsurugi's. When I reach T3 I'd rather build Battle Fortresses which are some rather needed armor at that point in the game, and then Hailstorms, but Blizzards just don't seem to make the cut... They also have a nasty habit of killing my own bloody Infantry if they get in the way.