Yes. When cued by these VHF radars, even our legacy 4.5 gen fighters would be able to track VLO targets, thus thwarting any such attacks inside our territory. But the problem is something like J-36. It has broadband all-aspect stealth. Not sure from how far our VHF radars would be able to spot it??!!
Delay in our own VLO fighter does complicate matters for us. But it is not an unsolvable problem. Integrate VHF, UHF, OTH, S & L band radars into our AD grid. We will also need passive sensors & a Stronger EW grid.
We need to go hard on stealthy large, unmanned UAVs. Ghatak UCAV, Abhimanyu CCA, CATS Warrior & Hunter etc. Use them as both a sensor suite & weapons platform. Speed up Netra Mk2 program, mid-air refuellers & the DRDO SCA program. Speed up the Su-30 upgrades, especially the Virupaksha radar & the Gandiva missile.
We need to have long range attack vectors for enemy's non-stealthy critical assets (like transporters, refuellers, AEW&CS, etc.). Say you have ground/sea launched AD missiles that can have a high pK against such targets at ranges ~500 km, you can seriously curtail enemy fighters reach and endurance. Maybe the AD-1 missile or a derivative of that missile can be used for such a role.
Finally, get the ball moving on a rocket force. Induct missiles & TBMs in good quantities. A proper space-based surveillance capacity combined with precise cruise & ballistic missiles can be quite the deterrent. All aircrafts, stealthy or not, will need to land at some point.
The good thing is that most of these things are within our capacity to make. Many of these already exists in service. The need is to order in numbers. Speed projects up & cut bureaucratic red tape. Unfortunately, Delhi is good at none of these things.