[Suhiir]

While I won't begin to try to speak for Don/Andy on this matter.
Experience and Morale ratings aren't simply a matter of volunteer vs conscript. The quality (difficult to quantify) and amount (both length of, and subjects covered) of trainig as well as any revelent "national characteristics" (example, the British military has a long history of being steady under fire) are factors that determine these ratings. Such things rarely change (for the better) during short periods of time (they may well degrade quickly in the event of a genocidal civil war for example).
I hope this helps explain why such a change may not (yet) be made to the OOB.