I don't want to disappoint you, but your zerglings are weaker than groundhogs.
They have [SPEED:2000] which means that they are slower than a snail, and they use a generic bite which won't harm your champions. I'd say, you've invented a race of quadruped hostile snails
. Also, their body is not zerg-like. Zerglings use crystalline claws to tear their prey and they even can damage a tank or a goliath, while yours barely bite through a cheap leather armor.
For example, here's a zergling from a StarCraft: Aeons of Strife mod I am making now:
[CREATURE:ZERGLING]
[NAME:zergling:zerglings:zergling]
[TILE:'z'][COLOR:7:0:0][SPEED:700]
[MODVALUE:2]
[LARGE_ROAMING][FREQUENCY:5]
[POPULATION_NUMBER:10:20]
[CLUSTER_NUMBER:5:12]
[LARGE_PREDATOR][MEANDERER]
[PETVALUE:50][DAMBLOCK:2]
[GRASSTRAMPLE:0][NATURAL][PET_EXOTIC]
[BONECARN][NOPAIN][NOFEAR]
[PREFSTRING:fast running]
[PREFSTRING:sharp claws]
[PREFSTRING:screeching sounds]
[PREFSTRING:spiked carapace]
[BODY:ZERGLING:TAIL:2EYES:NOSE:2LUNGS:HEART:GUTS:ORGANS:THROAT:NECK:SPINE:3TOES:BRAIN:MOUTH]
[BODYGLOSS:PAW]
[SIZE:5]
[MAXAGE:10:20]
[ATTACK:MAIN:BYTOKEN:RC:slash:slashes:5:8:SLASH][ATTACKFLAG_WITH]
[ATTACK:MAIN:BYTOKEN:LC:slash:slashes:5:8:SLASH][ATTACKFLAG_WITH]
[ATTACK:MAIN:BYTOKEN:RC:screech and slash:screeches and slashes:4:10:SLASH][ATTACKFLAG_WITH]
[ATTACK:MAIN:BYTOKEN:LC:screech and slash:screeches and slashes:4:10:SLASH][ATTACKFLAG_WITH]
[ATTACK:MAIN:BYTYPE:MOUTH:open the mouth wide and bite:opens the mouth wide and bites:2:6:GORE][ATTACKFLAG_CANLATCH]
[CHILD:1][CHILDNAME:zergling larva:zergling larvae]
[FAT:1]
[DIURNAL]
[LOCKPICKER]
[BIOME:ANY_LAND]
[STANDARD_FLESH]
[HOMEOTHERM:10070]
[LAYERING:100]
[SWIMS_INNATE][SWIM_SPEED:2500]
[MUNDANE]
I playtested it alot and the damage is acceptable to bite through armor while giving a chance to fight back against them. Well, protoss armor is harder, but terran personal shields are the main protection, because Neosteel space marine combat suit is easily cracked open by their claws.