Sure, they are all 1-shot-capable if you can get the Krow there. So many ways to do this:
Trap them against terrain
Catch them moving forward (Warlord cannot do a 180 quickly, you can totally catch it that way)
Single EMP Bombers
Spies
Dirtbag Spam
Gnats (after all, you already have gunship lab)
Moderator to slow all mobile units by 50%
Sneaky Pete to follow Krow and cloak.
Basically what you're saying is that
by itself Krow cannot do what it used to. Good! It could already do everything!
It was anti-swarm, anti-heavy, anti-air, and anti-porc, and faster than all land units, all on its own with basically zero support. ZK is a game of mixed unit tactics. Krow was a unit of single-unit tactics.
Now it requires support units to help it slow/stun/block the enemy. It now has to use mixed unit tactics again. Perfect. If you
use mixed units (unlike "Classic Jasper" play that relies on only Krow spam) the Krow is still extremely powerful. You just need to use more teamplay with mixed units and less "Sit in back and rush Krow, then save the day with only Krow".