Yes, I thinking to finish it and then merge it. I have a ways to go yet. It really does not matter it can be merged whenever, I add a new update. Once it is merged then it does not matter. Basically, all I am adding is buildings, units, and techs.
I was going to bring out an update version 2.9(The last finished update will be 3.0), when I get done with all the Imperialism techs, prior to when I begin the last phase which is WWI. So I will just merge it then, and do some playtesting. The big question is how do I merge it properly? Or is it easy enough to where I do not have to worry?