I vote for a one-rider replacement at the break.
I also feel there could be a place for a one-rider replacement whenever all three riders of a team score zero points at a meeting.
That's happened a few times this season. Those teams took a maximum hit of negative points. They've already been penalized. I would assume two riders had bad luck that race and one is consistently under-performing.
OR,
we could just carry on.
It's all a big experiment, and hopefully there will be a 'next season' to try again.
Choose to Ride.
Supports splitting everywhere.