I looked back a few pages and didn't see this idea posted. If it has been, could someone please kindly link the thread?
It would be extremely helpful to be able to sit out selected players during team wars and races for people who are on vacation, sick, busy with real life, etc. As the matchmaking algorithm is being reworked, it would be a good idea to work in a feature that could allow leads and co-lead to select specific team members who may not be able to participate in that particular war or race. They would be reactivated by default for each new war or race and need to be selected for away status each separate war or race.
This would also help balance the matchmaking effort by ensuring that teams have similar numbers of participants going against each other. Team morale would also likely increase as it could reduce miscommunications and blame.