I think you guys got the right idea. If you need more time to be able to meet the standards, and expectations of your supporters, then go for it. The only problem I can see arising from this is if after that long gap of development, people don't get the content they want. I think a great idea would be to announce the contents of the upcoming updates, and even open it up for a vote. That way supporters can have a say in who, and what they want to see more of. You're putting more power/control into your backers hands, ergo minimizing the potential discontent with each update. Yes, not everyone will be happy with certain updates, but at least you know a majority of your fanbase will be. That can also give you a general idea of where to go next with runner ups in the polls you use.