It has to be better ro replace it! Not just "karya anak bangsa"!As long as we're still unable to develop our own radar and other sensors, we will remain partially tied up.
I have high hopes that with us having the ability to construct the airframe, PT Len or other Indonesian companies can also begin to design and built those things domestically. While it's still feels like a long stretch today, but it's not an unrealistic expectation that in the next ten years or so we'll have our own AESA radar to replace the South Korean ones.
*cough* 20% *cough*