When analyzing an activity, the ability to select a section of the activity and zoom + see the key datas such as average/max power, HR, etc. would be great. This is a feature that exists in Strava and Golden Cheetah and that's very helpful. e.g. when looking at the power graph of a 1h ride, if you click and select the portion from minute 1 to 10, you can see your average and max power for those 10 minutes only. Very helpful to analyze your intervals when you didn't hit the "lap" button or see how you did on a specific climb, etc.
