I dont know why people are still discussing the utility of the LCA as a swing role fighter. Tejas is currently as good as and in many cases better than the mirage-2000.
1.Has higher thrust to weight ratio than the mirage(which somewhat offsets the energy bleed problem of a delta wing,again higher than the jf-17)
2.With more powerful engines come higher climb rate vis-a-vis the mirage.(again more than the jf-17)
3.Lower wing loading than the mirage(critical for high altitude maneuverability,again jf-17 has poor wing loading leading to degraded high altitude performance)
4.More efficient engines than the mirage and jf-17(I remember a pilot say that the 404 literally sips fuel).
5.Superior FCS to both mirage and jf-17.(according test pilots its better than the mirage)
6.AoA tested upto 24 but cleared for 22 will be 26-28 in FOC(which will again be equal to or better than the mirages 26deg,and f-16 which has a similar layout as jf-17 is known to have lower AOA than the mirage so naturally jf-17 AOA might be lower )Hell even rafale AoA is 27.
7.Ease of maintance,RCSwe have a winner hands down with the 404 engine and composites.
8.Avionics ADA has put in some fine technologies there with the proven 2032 radar,ODL,RLG nav attack,mayavi(dont about jf-17 avionics but the current LCA must be a good match for the mirage)
9.Weapons, python,r-73,derby(more than a match for the mica) are long proven but sd-10 is not yet popular among exports and amraam hasnt been cleared for jf-17 I suppose as there are no reports yet.
The one area jf-17,mirage have a clear edge is they are ahead in internationalization,have better doctrines framed by now and as they are the "do all" fighters for their air forces(PAF,french AF) their weapons fit is more diverse than the LCA where as IAF has other platforms for SEAD,interdiction,long range air dominance.
And this is for the ones who say that the relevance of the induction of 4th gen tejas in 2020 to 2030 period as fifth generation fighters will be mainstay please watch this video
Stealth is just a scam ,you compromise too much on performance for a gain which can be easily eroded by new gen radars. This is evident from the fact that f-16s,f-15e,rafales,typhoons,gripens are here to stay through 2035 to 2040 with major upgrades. So future aircraft should maintain a balance between all capabilities(affordability in procurement and maintenance ,agility,avionics,RCS) like t-50 so in that case tejas will remain contemporary for decades to come as it evolves and the same can be said to jf-17 and j-10.