Immigration in BOM this morning (16 dec) was a total mess.
Took me 1.5 hours (at 2AM).

Foreign passports were only distinguished by Economy / Business. Economy line moved faster ...so i joined that.
No separate lines for OCI or E-Visas.

I would say there were about 800-1000 people in the hall. So, 1.5 hours actually seems good.
FIngerprinting was one of the problem areas. The machines did not seem to work for anyone.
Yet, they kept on trying and trying for each pax.

I have never waited this long in BOM immigration. It used to be a breeze.