I see. Your assumption may be considered correct, and I do concur with some of your points. Admittedly when large portions of civilisation were brought in during the previous version, those were mostly historical ones and the proportion of original nations to those were unbalanced in the favor of historical nations.
The latest version has arguably addressed this problem by the addition of entirely new entities by staff and player alike, perhaps you'd like to take a look at the most recent map to dispel any doubts? I look forward to hearing any other criticisms or questions you may have, it's more constructive than other types of criticisms this map game has received thus far.