Everyone knows that zerg has horrible anti air capabilities without managing 3 or 4 units in conjugation with one another.
This is seen especially when playing toss. This is especially true for players below masters.
So to improve the game and to make it more balanced and more fun(aka not playing against toss air most games) there should be 2 changes to zerg.
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Give hydras 1 more armor. They are way to expensive for what they are and are the only anti air ground unit zerg has. Zerg units are inherently supposed to be inefficient, but hydras are in a really bad spot right now and need a slight improve them.
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Make swarm hosts an actual usable unit. Give them a second ability which allows them to spawn anti air units for resources. Like 50 minerals and 50 fuel or something like that.
Zerg currently has some useless units that rarely see play such as swarm host and infester.
Not saying p needs buff for ground army, but current meta is boring and really in favor of p for games below masters.