I love Zwift and have logged alot of miles using it over the past year.
I would love to see more support for Beginning Riders and runners though.
For cycling, 95% of the events are set with the bottom end of the Avg Watts level being 1.5 and higher. I have had to work really hard to get there, but that was mostly solo rides.
This is a great tool, especially for beginners. So, why not have more beginner group rides?! How about adding more .5 - 2 D rides, so more people can get the benefits and motivation from riding on group rides???
Same applies to running. I quit using the running portion of Zwift because I was walking so slowly, even when I was running on the treadmill. There really is something to be said for seeing yourself running in the app, when you are running on a treadmill, even when you pace is 20:00 minute miles.