Based on today’s episode, I believe agastya is not dead. It’s someone else body.
1. Face was intentionally not shown to audience so that they can twist the narrative later to bring him back.
2. Binni pregnancy truth cannot be proved by imlie or surya acting as agastya. Only agastya can prove it and explain to his family. The family will never believe any outsider as agastya heir is precious to them.
3. Agastya has to come back to prove Binni wrong and to see the true color of Binni so that he can understand how contract marriage can be misused and not all are sincere like imlie.He also needs to come back to give imlie and meera the rightful place in chaudhary house.
4. Imlie cannot love anyone else other than Agastya. I cannot believe that surya can even create a spark in her heart.
