that would change nothing. Didnt see any maxim in todays games. Most likely not a single one was build. Better copypast 50 cal profile or dshk. Both are balanced
Also upgraded cons reinforce price to 140, upgraded volks to 130 to better reflect their performance
It would also be ok of simple replace it with DSHK, making Maxim a doctrinal unit instead with HMG34 stats.
The only thing have to be is consequence for ALL fractions.
EDIT: and best thing would be unit-limits, which can be increased by upgrading with tech. That would be fist step of balancing blobbing.
e.g. T2: 1 DSHK allowed, build T1 you can build 3. T4 no limit.
Same can be made for german HMGs to prevent blobbing.
Also Special forces should have limits. Not more than 2-3 Fallschirmspringer or more than 2-3 Commandos without handy-cap. e.g. upgrading and extra side-tech.