-Add a second decimal digit to distance so you can time your attacks.
-Post the grade on signs on the side of the road that you can see from a distance. The +1 and -1 is cool and all but it would be nice to have actual grade markings posted before you get there.
-This may exist already but; let riders switch locations mid ride without losing progress.
- Design your own kit. Enough said.
-Paint your bike, add lights, under-glow, whatever strikes your fancy!
-Kids bikes and penny farthings!
-Add Pandora or another music service.
Thank you Zwift and Zwifters, I love riding!