Yeah... but it's not too late. It's your choose. If you want to play more, just take an earlier civilization and then flip to Australia.
Or maybe, add next war techs to DoC to go more in the future, and have more turns for late civilizations. I don't know. I don't think it's a great idea...
Almost nobody play to 1900s unless they're Japan or Prussia, mostly because of the frustrating waiting time to end a turn. Moreover, more civilization = more waiting turn. It has been suggested before (the same with Canada), and has been shot down too.
P.S: You're free to create your own modmod out of DoC, I think. Just ask Leoreth in the Modmod thread if you need help making the DoC: Next War modmodmod