That was just one singular land-based prototype that's allegedly not even intensively used/trialed on, using an old iteration of the WS-10s.
Why are they even brewing themselves a pointless F-14D situation in the first place?
Introducing another engine ecosystem is unavoidable, be it WS-10s or whatever engines the J-XD-S uses.
Wouldn't getting the maintenance folks familiarising themselves with indigenous engines and ironing out any potential problems with their integration ASAP be a better plan instead of waiting for the potential problems to blow up when the J-XD-S comes?
1) J-XDS will not be on WS-10s,
2) Both the J-15 and J-15T have been seen with WS-10s. That shows me they had every intention of putting the WS-10 on the J-15 family. So this idea that they are creating a "situation" for themselves without forethought is baseless. If it is just a passing phase then they would have just left the WS-10 on the J-15 and not proceed at all to another airframe on the J-15T,
3) There are well over 100 J-15/J-15Ts which is a significant number that they probably won't want to re-engine and it would further make sense for immediate batches of J-15T produced to fly alongside these on the two STOBARs and the initial Type 003 to keep the AL-31. Mixing engines on the same air wing is most likely what the PLAN wants to avoid in the Yankee/Shilao scenario.
Again, this is just a take from two posters in Chinese SM, though well respected. PLAN will use domestic engines in future aircraft like the J-35 and the J-XDS.
But the J-15 and WS-10 families might not be guaranteed for the second Type 003, 004 or 005 so re-engining them might be moot.
It all depends on whether they will need to build enough new J-15Ts to outfit air wings without mixing in older batches of J-15 variants and creating support for two engine types.