I would call it more a weakness in her wrestling. She lost all the scrambles and wound up on bottom. She did fine from bottom (very active and didn't get subbed). Contrast this with Maia vs Askren. Askren took down Maia (better wrestler and obviously Maia has the better BJJ) and even if Askren wound up on top Maia swept him or used BJJ to change the position. Santos was also stronger in the clinch but Valentina did ok there too, she had her moments. The weakness I see in Valentina's game is she's 'programmed' for a lack of a better way of saying it. She is better than someone like Santos by far on the feet but once they get close she automatically clinches and looks for the takedown. Santos is the better fighter in this position. She shouldn't be clinching against this type of fighter and she shouldn't be going to the ground. She's much better at range but she doesn't gameplan, she fights the same fight against everybody since she's at least very good everywhere. When she fights with a 'specialist' like Santos, this is the wrong approach IMO.