No. We have known what this ship is intended to be, for about 4 years now.
It is an LHD/LHA with an EMCAT. Its primary mission is amphibious assault, and the marines get their own organic CAS and ISR from drones that will be launched from the EMCAT. It will never operate alone, it will operate in an ARG likely in conjunction with a CSG (to use USN nomenclature).
This is the part that doesn't make a lot of sense. The idea that the EMCAT is integral to the primary mission of the platform ... and not secondary.
In terms of CAS for the Marines, in an amphib scenario, the offshore range that the LHD is supposed to operate at is actually quite close to shore. You're looking at most 50nm or even less - about 3nm if you have AAVs that swim to shore, maybe 10nm if you're using LCUs and/or up to 25nm if you're using LCACs to land heavy assets like AFVs, 50~100nm+ if the Type 076 is only involved in only the vertical assault, ie. helos only (light raiding force).
At these ranges, the organic rotary wing assets are quite capable of providing the necessary CAS support. Their speed and payload equals or exceeds that of most mature UCAVs platforms (ala Wing Long or MQ-9 equivalent). The only difference would be Time on Station but an amphib landing scenario is not one where you require a CAS platform with long loiter time. It's a target rich environment where you will probably expend all ordnance quite quickly and head back to mother for a quick turnaround.
And this is where it may get tricky? MQ-9/Wing Long pattern UCAVs adds a very large footprint platform that needs to be moved around hangar and deck (even with folding wings) in an already rather busy environment. CATOBAR and rotary wing ops are pretty much 2 separate sets of ATC that you have to account for on a crowded deck.
To add to that, if it (ARG) is functioning within the 1st island chain or with a CSG, then the CAS/ISR needs of the ARG are easily taken care of by land based air or the carrier wing. Fast mover jets are much more efficient at carrying ordnance than UCAVs. Your KJ-500/600 and others are also already on station and there's nothing much more a Type 076 can add to that unless it's tactical CAS and ISR, in which case, I'm looking back towards rotary wing CAS and small UAVs (whatever is the PLA equiv to the Orlan 10).
[If we're talking about using heavy UCAVs like a Sharp Sword analogue, then we're starting to cook with gas but we still haven't addressed the issue of this singular EMCAT providing a rats fart contribution in the face of the sustained sorties provided by land based/CSG air. Not going down that path unless there's compelling reason to
Likewise if we're looking at a sulf-sufficient PLANMC like a MEU/MEF, the sustained ops capability of a single EMCAT just isn't going to cut it. You're better off trying to develop a STOVL multi-role jet or upsize the Type 076 to better improve the sustained air sortie capabilities. Again, not going down this path, reason see below]
I highly doubt the single EMCAT is meant to be a significant capability enhancement for a shooting war, for reasons previously mentioned by others. (low redundancy, low sustained sortie rates, doesn't fit into the scheme of things)
Requirements dictate the platform. Once we understand the requirements, we understand why a platform is spec'ed the way it is.
There are other use cases for military assets besides an all out war. Ergo, there are other requirements that drives a platform designs beside war
A LP/LH asset is actually one of the most innately Operations-Other-Than-War capable and sought after cross use platform in the Navy. OOTW use case where the EMCAT may prove useful could be in support of the Gulf of Aden anti-piracy patrols and other possible areas where the PLAN is required to secure its SLOC. The ability to bring a MALE UAV in-theatre would expand the patrol footprint of the PLAN anti-piracy efforts quite significantly.*
So this is where I think the rather curious case of a single EMCAT on a LHD makes sense. China doesn't have military bases all over the world nor does it have excess CVs to spare to bring workhorse fixed wing assets in-theatre wherever it may require them. In this case, a LH platform masquerading as a CVL is quite a significant way to enhance the OOTW reach of the PLAN, until the day it has (and needs) a dozen CV/CVNs. Even when it does have CVs to spare, a "CVL" may still makes more sense when the requirement doesn't require a full CV - also why the USN is looking at FFGs as their DDGs get worn out trying to cover every requirement.**
* For Gulf of Aden, Djibouti is a possibility but we're looking at about 1,500nm round trip to get on station - 3,000nm if Somalia overflight is not allowed. That is a sizeable chunk out of an approx. 5,000nm endurance of a large MALE.
** For a real world case of how a LPD is used in a HADR setting, look at Operation Flying Eagle - The RSN disaster relief operations following the Tsunami of 2004. The lessons learned are also partly the reason why the follow on ship to replace the Endurance class is not like-for-like LP but a through deck LH style platform aptly called a Multi-Mission ship.