Kaveri is getting hyped again.
Indians got a rude shock; the overpriced jets they bought didn't help much. If you're going to get your planes shot down, might as well be cheaper homemade ones. The problem is that the Indians are overestimating themselves as usual. A jet engine at a high quality level is still many years away. And the plans to "co-develop" a more powerful engine is the typical Indian mentality of "leapfrogging" before mastering the basics.
Besides, how many times must they be told that rich countries are not going to give away their secrets? ToT is mostly a PR tactic to lock in buyers with false promises.