- Using queens to increase the number of larvae per hatchery.
- Using queens to spread creep, which makes the ground units faster while it gives you map-control.
- All zerg ground units can burrow, the infestor and the roach can even move while burrowed.
- Spine crawlers and spore crawlers can be pulled out, so that they can move but not attack. It takes some time to bury them again.
- Overlords could get an upgrade, so that they are faster and that they can transport units.