I think that if the PLAN intended to use the 071's well deck to hold IFVs, they would have just designed larger vehicle decks and a smaller well deck instead. One well deck section could be turned into two vehicle deck sections. This is actually how the San Antonio LPD is designed. Its well deck only has room for 2 LCACs and plenty more vehicle deck space than the 071. It seems to me that the reason the 071 sacrificed vehicle deck space for extra well deck space is precisely because it is meant to be used with all 4 726s at once as part of a beach assault. This indicates to me that the emphasis is not on shear numbers of IFVs but a combined mix of IFVs and non-swimmers like MBTs and jeeps. As for the tradeoff it's not 10 IFVs for 1 MBT. The deck space taken up by 9 ZBD-05s could fit one 726 loaded with 1 Type 96 and 2 jeeps, or 7-8 jeeps, or 3 5-ton trucks.
By way of comparison, the ground vehicle force of one US Marine Expeditionary Unit (MEU) consists of:
4 M1A1s
7-16 LAVs
15 AAVs
6 155m howitzers
63 HMMWVs
40 medium-large trucks/logistics vehicles
A beach assault force isn't just a bunch of IFVs, but a mixed force of many different vehicle types. In fact there are more logistics vehicles then there are combat vehicles in an MEU. The LHD and LPD will have more combat vehicles and less logistics vehicles, and the LSD will have more logistics vehicles and less combat vehicles. In the PLAN there is no known LSD design in the works, so an equivalent force would possibly consist of one 075 and two 71s, each of which having a more even spread of combat and logistics vehicles.
IMO, what you are describing may be more oriented towards a general purpose MEU assault force that can be suited to multiple different kinds of environments -- and I think for such a purpose, a more multirole loadout and having LCACs in the ship (even including 4 to use up all well deck spaces for LCACs) is entirely sensible. The ground force of an MEU is intended to go more inland and to continue to sustain themselves.
But for a Taiwan specific contingency, where the strategy will likely initially be much more about securing an initial beach head through speed, firepower, and numbers, I think jobjed's suggestion is logical.
For example, in the first wave of a beach assault, things like trucks and 155mm towed howitzers probably won't be of that much use. Instead, the goal would be to storm the beach initially with substantial fire support and other joint force activities. Once a beach head is secured, they will start thinking about depositing more longer term ground based fire support and ground based logistics/transport vehicles and hardware.
I can see the first phase of an amphibious beach assault to be made by a large number of amphibious IFVs from large LPDs, to advance up the beach, before LSTs, Zubrs and 726 LCACs start depositing non-amphibious heavier AFVs like MBTs and heavier IFVs to consolidate their position and secure a more thorough beachhead, and then to start landing vehicles needed to sustain a longer term invasion beyond the initial amphibious assault.
Of course, a big problem with relying on amphibious IFVs (even ZBD05 derivatives) for the first wave, is that it will force the motherships like LPDs to get relatively close (within a few tens of km at least) of the beach, putting it in threat of not only shorter range and more primitive fires like land based artillery and anti ship guns as well as naval mines, but also of course things like land based AShMs and attack helicopters and maybe even jets with AShMs if any still exist by that time.
One way to try and heavily compensate for that closing distance is by having a large number of LCACs to position LPDs and the like further out to sea and reducing the transit time of AFVs by virtue of the fast transport time of LCACs.
Substantial fire support and artillery bombardment against shore positions, and thorough AShM hunting will be complementary to the overall effort as well, and sea based AAW and air superiority with AEW&C and joint networking will reduce the threat as well.
One idea I've toyed with, for a purely Taiwan scenario, is if the Chinese Navy can build a fast speed LCU, something the size of the Mk 10 LCU; a 240 ton ship that is able to carry up to a single MBT, but able to operate at a relatively higher speed like 20+ knots similar to what BMT once proposed (
), vs 10 knots of a Mk 10 LCU.
The benefit of such a ship, IMO, is that they can likely be built en masse and relatively affordably by Chinese shipyards, and will have the range for a round trip from one side of the strait to the other, so they do not have to rely on big LPDs as a mother ship. The large number of LCUs mean there is no single point of failure like an LPD, though it will be harder to coordinate a mass LCU rush against a beach.
an LCU is obviously far less flexible than an LCAC in terms of being able to assault multiple different types of environments, but I think a high speed LCU in large numbers will offer substantial meat to an amphibious assault-lift force (in particular by their ability to deposit MBTs onto the beach), while being potentially much cheaper to produce and able to procure in larger numbers than 726 LCACs.