Integration i doubt will be a problem, all the assets are interlinked- tps77mrrs with hq-9s etc etc. Plus, if need be, CAMM can operate as a standalone sys paired to its other batteries or a network interface can be developed with the oem.
In terms of cost, in the bigger picture CAMM is the way forward IMO. Its a real shame and extremely infuriating the services did not adopt a common system. All 3 branches would have been extremely well served by camm, wed have probably been able to negotiate production facilities blah blah.
The reason why its important is really and truly, these Chinese systems are old. No matter how much lipstick you put on a pig, its still a pig. The missiles are derived from their soviet counterparts so suffer from the same limitations. The other aspect is, Chinas threat environment is SO different to ours. Their primary objective is the US, who does not deploy hypersonics extensively atm. But even more so, they have tons of depth so detection time is more reasonable. Even if China continued to modernise these missiles, they can free up a ton of space with new propellants electronics etc, but with their foe being the US, theyre probably packing in a ton of crazy advanced electronics, designed to face the US' EW might. Again, not an issue for us because the Indians havent really paid much heed to EW.
Beyond this, fundamentally, these missile systems are decades old. SAMs are a long term buy. At some point, the Chinese will lose interest in supporting these systems and then were buggered- we bought in so much, but did not setup any local supply chain to support these procurements, so if the Chinese lose interest, itll effectively be "deal with it".
In terms of cost, a $1m missile will be cheaper than losing a jet on the ground, or an aew etc. I also would be surprised if Chinese missiles are a ton cheaper. Im sure they are, but the disparity is probably not huge anyway considering they pull our pants down any chance they get.
When it comes to HQ-11, im opposed to us being beta testers for anyone. Particularly China. The reality is, we need to partner with those whos primary threat is the same one we face. So this narrows it down to Europe. We are effectively in the same position. Either them or Israel.
In terms of the actual missile, again, lets ignore ranges for a minute, just looking at the two missiles, you can see CAMM is alot more compact, likely alot more manuverable due to its TVC but also, post launch, its thrusters can position it perfectly for interception. The CAMM is an extremely, extremely capable missile and IMO is the perfect system for hypersonic interceptions. If we look at ranges, camm weighs 99kg and offers a 25km range, same as HQ-11, but CAMM is a far smaller, less draggy missile, designed likely to operate in lower parts of the atmosphere, unlike HQ-11 which is probably suited for flight in thinner air. What id actually propose is what the Euros did with Aster and what the Indians are doing with their domestic S400 variant.
Take camm, use it as the baseline for a family of missiles. CAMM for Shorad, CAMM-ER for MRSAM, CAMM with a booster for CAMM-LR. Either this, or buy into IRIS-T SL, of which the german have now developed SLM, SLX, another longer ranged variant and are even coming up with a HTK version for BMD... A full family of missile, bottom to the top.
Forget these Mix and Match Chinese systems, procured via closed bidding- its all very dodgy, i am heavily against any equipment procured without an evaluation process, no matter how well it fares, whether this is J-10c's or PL-15s.