I don't think many if any of these are going to be implemented, but it doesn't hurt. I'm playing a custom game on the Planet Earth campaign map, and the sheer volume of countries means my income is over 100 gold a turn, just from Europe alone, so I have massive armies.
Request: I'm already playing with the Recruit Multiplier set to 2, but what I'm thinking is that maybe there could be a Gold Multiplier, for buying units on the Campaign Map. I wouldn't change it from 1 on every map, just maybe the large ones, so as to reduce the size of huge armies, making it harder to win.
Also, if it can go less than 1, like the Recruit Cost multiplier, you could combine lower strategy map cost with increased recruit cost to make strategy map units worth even more compared to ones you build in the RTS match.