darski
Regent in Training
On Palenque:
You checked the 7 "unused" mined grasslands and none of them was a bonus grass, correct?
You might have switched to mobilization, giving one extra shield each square.
General remarks:
Having warriors in industrial times is a terrible waste of money. You should use outdated units to rush important builds.
Having units in non-frontier cities is a terrible waste of resources. Either use them for fighting, or for guarding borders, or disband them for rushing important builds.
Your last remarks depend on Govt. form, A warrior is just as good for MP/happiness as a Mech Inf for a Monarchy. Ok, I admit to a certain fondness for my (warrior 01)

