I think we need to use the experience of the JF-17 to build a new twin engine jet that will give us deeper penetration and will be essential for our naval defense as well. I heard the Block 3 is going to be very advanced and it uses top of the line radar tech acquired through Turkish help. Pak has had alot more design input in Block 3 than in any other blocks. There is talk that Block 4 and 5 might be completely in-house.
A dual engine JF-17 (will have to be another model number JF-18 perhaps) can essentially sink the INS Vikrant, which I think is the biggest threat that India has.
PAF will acquire a version FC-31 as interim and then whatever is the result of Project Azm (collaboration with Turkey on a stealth fighter).
BTW INS Vikrant has been decommissioned. Two carriers India has is ex HMS Hermes (INS Viraat) and ex Gorskov (IND Vikramandithya).
Viraat can only carry sub sonic Sea Harriers which they will not be bringing even remotely close to our SLOC. Vikramandithya does carry Mig29s. However No 2/4 Sqn Jf-17 carry CMK-400 AKG supersonic anti ship cruise missiles. Which are more than capable for the task.