Nobody wants to see any esports game played 4v5. Ever.
We've had it in EML, SAL and now NAL. There HAS to be a better process put in place going forwards to protect both competetive integrity and broadcast quality.
Allow mid map subs if needed (there are almost 0 genuine 6 man rosters), or delay games, reschedule them to future playdays.
There's no 1 perfect answer and people will say "well that's open to abuse", but at the end of the day, all the viewers want to see is high level competition and that fundamentally cannot happen when a game is 4v5.