At this point, having add-ons as part of your Kickstarter makes me less likely to back it. And the more complicated things are, the more this counts against you. Why?
First, there’s simply that I have to make some attempt to understand things even to decide to choose a simple option.
The more complex things are, the longer it is going to take you to fulfill my reward. Even if I personally choose a simple option.
The more complex things are, the more likely you are to make mistakes.