historically armies tend to "learn" only after bitter experience.
Was just thinking about it.
For as much as we know, the new system will promote keeping your experienced cohorts experienced through all the fun stuff @Todie mentioned. But do battles provide any amounts of the resource? Because IMO they should. And I also believe that the worse you did in a battle the more you should get, actually - this should scale heavily with the scale of the battle and your general skill. Huge battle should not only generate warscore but also have impact on your nations willingness to improve its military, need for reform - especially if the battle (or war?) was lost. However the skill of the general leading the battle should determine his ability to draw conclusions from it and the resulting amount of exp points gained.
Question to the devs: does the cohort being loyal to a general affect in any way its exp generation?