Here is a new rule for elven realms. Every time an elven unit is raised, one population level is subtracted from the elven province it was raised from. The reverse holds true, every elven unit disbanded, raises the province level by one.

Pros: It is an attempt to capture the feel of the elves within the rules. Every elven life should be extremely precious. War should only be a last resort, not because of moral qualms or fears, but because the loss of elven life on the battlefield costs the elves their most scarce and precious resource.

Con: it is a very severe limitation on the elves. Someone could use this rule to move populations around. Raise units from several provinces, then disband into one. Could be useful for Tuarhievel should the guilds be developed.

Other: This also limits the elven military power that was greatly raised under the BRCS, because of their virtual guilds and the huge revenue increase derived from them.
Their is no neccesity, in my mind, to apply the same logic of exponentially increasing population, with higher province levels found in human realms. Elves are an alien race, and so can be treated as such. This also sets the remaining elven populations at a low level. In the thosands for most evlen realms. I like that feel, other might not.