. Why should Grens alone be able go face to face with everything?
They don't go face to face with anything right now is the problem. Maybe they can force a conscript to retreat, but they can't capitalize on it since they'll be down to like two wounded and end up retreating too.
Paradoxically grens not being able to fight makes OST an infantry army since you can't protect team weapons. HMG is only good for the first 5 minutes of the game where there aren't enough squads to flank, and maybe the last 10. Hence the 'team weapon' army almost always fields 4x infantry in 1v1 at least.
The rework I purposed a couple pages ago doesn't fundamentally alter grens balance, but instead trades survivabilty for lethality. If they actually had the damage output to deal with a single squad flank rushing a team weapon you could build more. Until then all you'll see winning in even matched games is 4x infantry, an MG, and maybe a PaK.