There are pros, cons different risks in both the revelations, happening first.
Savi's revelation first, pros will be.
Sai will immediately gain an upperhand.
Bk, etc will favour her.
Vinu might not be prioritized and then sai and vinu will develop a bond.
Heir drama.
Everyone favouring savi and ignoring vinu, only to fall flat on their faces after Vinu's revelation. Will be fun to watch them guilty and how they justify their love for vinu after being Biased.
Savi and sai getting their share of happiness and good treatment.
2 PARIVAAR. If the truth is at least hidden first.
Virat getting angry but melting later. And many more.
There are many benefits of Vinu's revelation first too. Especially if they properly focus on the congenital issue.
3