CX has greatly expanded services to India, so you're likely to see a lot of D availability in the short term until demand catches up. Starting Feb 29th, they will have daily flts from BOM and DEL (instead of 4 weekly) and additional flts in June from MAA. DEL will become twice daily and BOM 10 times weekly by mid summer. KA will have flts from BLR by June. All in all, if you have mechanical or other problems, BOM will give you a large number of options.

On the other hand, CMB usually has much lighter load factors than BOM or DEL.