Anymore discussion of 052D and 055 will get way off topic...though you guys does have good points there.
But, with the PLAN still obviously short on the land attack package (ie. the ships and planes that to carry them to firing range), they might need to look into other options to make up the numbers...
This is all academic, but even if we saw evidence of an LHA in early construction tomorrow, it would still only enter service by 2020, and by then I imagine nearly all the projected 12 052Ds will have been commissioned and able to carry LACM heavy loads that may be viable especially if such a task force is also composed of 052Cs and 054As in the primary AAW roles.
So how "short" the PLAN are regarding land attack really depends on the scale of the operation we're talking about, as well as when such an operation is going to occur.
If they're willing to commit only a pair of destroyers in an operation desert storm type situation against a foe similar to Iraq of the era set tomorrow, then yeah, there's no way they'll have enough missile tubes.
But if say, if it's 2025 and they're looking to conduct a Falklands type scenario against a military akin to the capability of Argentina's of the era and are willing to send the better side of half or more of their navy (say, three destroyer flotillas worth of surface combatants), then I'd say the PLAN will be more than capable in its potential LACM capability.
And a fully operational Liaoning, even if we are conservative and assume there is a slight penalty for STOBAR launch, will still be able to launch J-15s with reasonably competent A2G loads and more than operationally useful fuel loads simply given how large and heavy the flanker is, so that even if it can only take off at 3/4 of its MTOW, that is still a lot of range and an impressive amount of munitions to be carried.
If you're talking about CAS, then that is another discussion entirely because at present the PLA's fixed wing A2G platforms are not really oriented for CAS but rather for stand off strike against high value targets.
But in both cases, I strongly doubt we will see PLAN or any other navy include a LACM capability with their LHAs. The Soviets came closest by including a variety of AShMs with their Kievs and Kuznetsov carriers but they really were the last.