As a klingon desperatley awaiting the live launch of foundry to have a more interesting leveling experience i am afraid that the foundry might not offer a viable leveling path if the xp is limited.
i know there is a valid argument that players would create maps with nothing but mobs to farm to level up, but the empire defense areas are basically just that.
I think the missions designed for quick xp would be the most unpopular as Klingon players are dying for stories!
Also having spent the day playing many of the fine missions you have worked so hard on I must say this tool is going to elevate STO immensley in the MMO market. All i ask is you please please please make Klingon missions as well!