When we start to think about what skills we will add, we had one thing in mind: we wanted that the skills have some synergy together. The main idea behind the skills was to open new paths using them, so you had to think and see if a path is possible or not.
The most powerful skill is the dash, that skill opens up a lot of paths, but, when is combined with sprint and glide it becomes even more powerful.
We though also about other skills like a using a rope, walk on the wall, or reverse the time skill. But after all we decided to keep it simple, and at the end we think that we have made a good decision.