Liang could split the desert in two with a single swing of his sword or turn Alucard into dozens of cubes of meat in a second. The strength of his body was at an incredible height, even for Gael it would be difficult for him to resist such a strong and fast opponent.
Axalts' physical stats were always higher than other races, even Vampires, Beastfolks, and Ashens, couldn't show similar results. This was the Axalts' advantage and the consequence of having to absorb energy for much longer than other races.
So, considering that Liang was the strongest Axalt, his body was the peak form, the dream for every Axalt, and there was a reason for that.
When he killed Ynez, and she was about to blow him up after his death, using the energy in her core, Liang was not affected in any way. He didn't defend himself, didn't move away to a safe distance, and didn't use any special skills. There was no need for him to do so.