My suggestions would include stop removing popular features (leaderboard), stop re-organising basically the same set of options thereby making it a pain to use, remember that GC is basically a data repository of users's data - so make the editing and displaying of data better, i.e. removing of outliers/bad data, useful/adjustable graph scaling, etc. To name just a few.
Better Segment support. When I look at my last running activity, it tells me I crossed 2 segments, but it does not tell me how I did (how long it took.)
All I can do is click on the segment and I can find out my best time ever, but that's not useful if I don't know my time on the current activity.
I like how Strava tells you your time, rank on the segment overall and tells when you if you make your 3rd, 2nd or best time (PR)
