with topology that dense i doubt you see any problem in deformations (animations) i'm not familiar with what AAA is doing with characters these days but it seems an needlessly excessive amount of geometry for games IMO. if the topology is not following the silhouette you may get some weird shading, but just test it and…
Thank you for advice @Alex_J , so as I understand , these cut-in edges not that necessary until my topology follows the silhouette and works well while testing it with some movements animation?