Not yet. It would be easy to spot visually by changing the 730 CIWS to 1130 CIWS, the Type 346A radars would lose their windshield wipers (the field calibration booms for the AESA), and the cylinder shaped ESMs to the R2D2 shaped ones.
A few 052D, namely 120 and 155 are like in between the first and second blocks. They have the first block features but the radar has been upgraded to the boomless variant.
Surprisingly or perhaps not so, most if not all the 052C has all their cylinder shaped ESMs changed to the R2D2 ones, so I guess those things are important enough to do this effort. The earlier 052Ds have not made the change yet. These things remind me of the DWL002 passive radar detection system and the new one remind me of the VERA NG.