I have entered multiple events in the past 6 months and one thing is clear: the range of watts/kilogram is misleading. Apart from time trials, races and rides start off well above the top end of the zone, and so if you enter a C category event and want to ride with other people, you have to have the capacity to spend the first 5 minutes at ~4W/Kg (well above the stated 3.1W/Kg ceiling), and then hover at FTP for the remainder of the event. If you ride tempo, you are shelled out the back and spend the hour alone.
Here is an idea: for races, sure, fine anything goes. The point is winning or helping a team-mate win. For rides, perhaps the assumption should be that people want to ride together more than alone. So perhaps the stated range of W/Kg should not use one’s maximum hour-long capability as the ceiling. Instead, perhaps index the pace to zone 3, sweet spot, tempo or something other than one’s FTP. Until then zwifters who want to ride with other people are either going to avoid events and start using the meet up mode instead, or they will select the range of W/Kg that matches their tempo pace … and they will ride tempo and be able not only to enjoy the company of their fellow rides but also enjoy all the glorious flowers and hills and chapels and balloons and rolling scenery.