I know very well what I say. However you are over pessimistic. What ever I say is very much a part of Mk 2 design.
Forget about Mk2, even Mk1 is also a very good plane.
Anyone can make big mouth statements about future aircraft performances..... even before the first prototype has been assembled. Look at almost every design process in aviation history.... it takes decades to build up world class aviation industry and huge investments.
And Tejas is surely a decent 4th gen fighter... definitely able to replace the Mig 21s, but is it a "very good 4th gen fighter?"
-Speed is comparatively low (Max. speed is 1,350 Km/h), that makes it difficult to outrun or to catch up with enemies
- Service ceiling and combat range are lower than another lightweight fighter like the F 16 B50, which limits its effectiveness
- It has a lower payload than F 16 B 50
- AFAIK, the Tejas has not fired a BVR missile yet? But I could be wrong on that...
- TWR of Tejas is less than 1.0, while the F 16 B50 has a TWR of over 1.0... that means that the F 16 can outclimb the Tejas in a dogfight
- Tejas has a lower G tolerance than the F 16, which makes it harder for it to pull high G maneuvers in combat.
- LM already experiments with stealth technology on its F 16`s, Mikoyan Gurevich already puts TV engines on its Migs, both also successfully tested AESA radars and other advanced avionics on their models..... meanwhile, what has HAL done?
- Does Tejas use the Kaveri engine? No, because it simply underperforms compared to other engines.
etc etc etc
I am not bashing HAL here and saying that they are incompetent... but they are simply not on the same level as companies like Mig, Sukhoi, Dassault, BAE and others which have been building aircraft since WW One !
They cannot come up with the best fighter in the world just like that.... aviation industry takes decades to envolve and massive financial support to get to the standards of companies like LM, BAE, Dassault etc etc etc.