The benefit of a loan against FD is that it has a lower interest rate
Savings done by depositing extra money into the home loan overdraft facility should outweigh the higher interest cost charged from you
Interest has to be paid only on the amount used
Just remember, that better transmission will also mean faster increase in home loan rates in a rising interest rate scenario
The external benchmark may not lead to fair pricing as banks can always cut the spread for new customers. But your spread can't change
Banks have 6-month and one-year MCLR; one should choose based on interest rate outlook
Shop around and weigh the pros and cons of various offers before deciding on a lender