India was too optimistic about Tejas. and ADA miscalculated badly, remember its ADA who was designing Tejas and not HAL.
Rather it was too many new technologies that were to be developed simultaneously to get the plane for India, The Engine was the biggest drawback and that actually messed all the timeline of Tejas.
So now it might be better to develop the engine and then to uprate it as required. We can try and get ToT for avionics or jointly develop them.
Once the LRIP starts with final version of the plane, it wont be difficult to increase the numbers, We have to try and get about 32 planes a year (2 squadrons) so that it can be paced well,
LCA Mk2, I really wish its twin engine design with smaller engines instead of one big engine, ITs just my wish..
Engine didn't mess up Tejas as it was already decided in 2007-8 that Kaveri will be separated from LCA. But, there was lack of funding from government. From 2009-2014 there was practically no development on Tejas. This delayed timelines.
We dont need ToT for avionics as we already have it. Uprating engines are for later. We need to have engines first, Tejas MK2 is already designed as a single engine plane. It is AMCA that will be twin engined.