I expect that there will be quite a few significant changes.For the good of PLAN, I sincerely hope there is major differences between the first domestic carrier and Adm K class even if the external dimensions are similar. While they made serious interior changes to CV-16 to better the living condition of sailors for long missions, they can only do so much with an existing design, I don't have any issue with building another stobar carrier, but I do hope they get something other than steam turbine to provide power.
The entire missile silos and the structure around them for the SSMs will never be there and that space much more judiciously designed. I expect they can (working with a clean slate from the ground up on this design) accomdate gas turbines into the design if they so desire. I expect that there will be significant improvments to the hanger deck, and to the elevators...probably making them bigger and perhaps even changing location a little. I expect that the island may end up smaller with more parking space on deck. Although it would not be as noticable, I expect that the bunkerage will be different and more in line with the PLANs needs and long term outlook on Carrier operations. The way munitions are stroered and handled may well be changed and be improved.
We will see with that design if the PLAN is comfortable with and intending on long-term J-15 commitment to PLAN's Naval Aviation. If so, things on the carrier will be set up to enhance and allow for the J-15s individual characteristics, as well as including whatever their next generation go forward plans are.
A truly PRC/PLAN build of the Liaoning will be significantly improved over the Kunestov, and will provide the PLAn with a very logical and well thought out stepping stone to their next carriers, which IMHO will definitely be CATOBAR.