What if we also increase cost to 300MP? But make normal arc like vickers and mg-42 have? Increased cost, increased time to build, tweake stats to make it worth to build.
Spammable only cheap units. If your unit expensive, but workable, it didn't able to spam. Better have 1 HMG that works, that have cheap HMG that don't work at all.
I myself am a fan of making it more expensive and yknow.... Work. As is right now you need to spam maxims because a single one doesn't cut it.
Additionally maybe instead of lowering the fuel cost of t2 some sort of incentive that buffs cons perhaps would be a better way to make it appealing.
Ideally, cons are your meat, but penals and maxims help the cons operate either through controlling the enemy, or crushing them respectively. Neither SHOULD be making up the bulk of your army but there to push the line of pierce it.