Superior Firepower R-R infantry is quite as good as Mobile Warfare on Org, if you use full 5 support. I think I like it more than SF R-L
The Mass Assault -R infantry has good Org too, but their tank (MOT) division is bad. If you mix tank with infantry then it is Ok, cheap tank division and high Org.
When you are weaker and have to defend, every Org help. When you are stronger, anything can do.
Grand Battleplan is good if you are minors in the Allies, to get research bonus.