So you're taking the best aspects of any fork you can find? Trust in the developers is an essential part of the question.
If a piece of software passes every audit in the whole world, but is developed and maintained by the NSA, you'd be stupid to leave your data with it.
If I understand this right, you're looking for Continuous Collision Detection
i.e. rather than calculating collision by looking at the intersection of objects in every frame, instead calculate collision by drawing out the path the object will go, and looking for collision along it.