A few questions, please:
Isn’t J-10C quite stealthy from the front? We heard that the US was impressed by the PLAAF’s ability to intercept an F35 using J20 and KJ-500, so presumably KJ-500 could also direct a J10C?
KJ-500 is a AEW&C, it can direct and command a variety of aircraft and assets, and yes that includes J-10C.
J-10C is a 4+ generation fighter, it is LO at best, and certainly not VLO.
Is there any possibility of J10 getting WS-15 in the future?
It's "possible" but it doesn't make sense why they would do so. WS-15 would be prioritized for J-20 and 6th gen fighter use.
Using WS-15 on J-10 (even if it's a new variant) is a waste of resources.
If the internals are being rearranged with a new spine being used, this could mean more room for fuel, and if stealthy conformal tanks are added this could be even better.
All that could mean there is plenty of hope for longer range in the future, while keeping costs low.
Developing such a significant variant of a single engine light/medium weight 4th generation airframe is not worth the aerospace resources, money and time.
You're better off putting it to other things like new projects (whether it's 6th gen, MUMT UCAVs, or a 5th gen medium weight fighter, or a combination thereof).
China's aerospace industry has enough experience and enough ongoing projects that it doesn't need to keep modifying and stretching the J-10 airframe to do other roles that it is suboptimal for.