When in a crawling position, if the player switches to third person, a notable gap can be seen between the majority of the player's mass and the ground, which looks wrong - more contact would be expected.

While fixing this may be as simple as lowering the player's model by a sufficient amount if the game detects the player is crawling rather than swimming, a preferable solution would be to just create an independent crawling animation in the first palce instead of just piggybacking off of the existing swimming animation, which looks weird in many cases (especially the arm movement).