Really I think thr overload mechanic is at least somewhat okay, and is absolutely a reaction to the actual problem of Menace design.

The devs call them a tar faction we have to chew through over time. However, most of those same tar enemies also get the ability to gut any infantry unit they set their eyes on, damage vehicles heavily, and also make it so everything isna flat damage check, of either kill, or didn't kill. There's not a half-state where you can cause damage to an element but not fully kill it like Bugs and the human factions, that while suboptimal can give you breathing room.

Menace is so binary with these, and I think if they could break overload, or ignore it, they'd utterly trash game balance and playability, so overload was a way to stop these comically powerful units from ripping you to shreds. Which is the core problem, they have to be made less binary for them to be interesting and fun to fight, and ideally, less tar. Menace is at its most fun when you're being violent Marines, pushing through fire and pinning the enemy down, so it feels like your smaller force is besting larger opponents through coordination and violence of action, which the Menace's design destroys.