Warhammer 40k MMO balance issues?

[Asehujiko]

What are your opinions, you extravagant beasts?

Side A plays as loyalist marines.
Side B plays a chaos legionaries.
Then they both get a quest to fetch 20 squig spleens on their respective planets.

Canonically, they are even more effective. A single company (about 100 marines) is considered enough to pacify a system of planets. A full chapter (1000 marines) can lay waste to a sector of planets.

That is when they're not getting their shit kicked in by the thousands by purple monkeys with heatseeking arrows. Or crying themselves to sleep over not having blue armor. Or getting lost aboard their own ship. Or getting lost with their own ship. Or getting their ass kicked in 1v1 melee by a regular human. Or deploying in force to take on 100 baneblades, none of which show up, then failing anyway.

All of these events are canon.