It would be really helpful if the graph in the top right showed any group in a different colour or icon. It’s really hard to know where they are in relation to you and if you are in front of them (so need to ease up) or behind them (so keep chasing hard).
Also might help if maybe if they had some sort of halo above them on the mainb screen, similar to the ride on thumbs up?
The current method of different jersey or bike doesn’t work because in a group of 100 riders it’s impossible to see it.