Regarding the recent change to reinforcements:
4 - Riflemen
In-game reinforce cost increased from 20 MP to 30 MP.
This was done because getting 200MP worth of Rifles for 120MP was too great of a deal. Now, you get ~134MP for of Rifles for 120MP. which is pretty fair. However, I would instead recommend reducing Riflemen's reinforcement cost back down to 20MP, and instead increase the cost of the Replacements ability to 200MP in the launcher. This will maintain a similar cost:benefit ratio to the current rates, but would allow players to get more actual in-game use out of each Replacements (reinforcing 6 men per, instead of just 4).
Changing Replacements to cost 200MP for 120 in-game Manpower, to reinforce 6 Riflemen at 20MP each, would be the best way to handle that doctrine. Rangers, weapons crews, and other units can also have their reinforcement price set to 30MP.
Namaste.