Two (related) questions to ask yourself come to mind immediately:
- Are there things that can be done in more than one way?
- Are there methods/properties on the API that can be expressed in terms of the rest of the API?
More difficult to answer, and not a sign of overengineering in itself, but definitely a sign the API isn't as simple as it could be yet:
- Are there other methods/properties you can introduce that would make it possible to remove more than you introduced (based on the other two questions)
