Using the hook grip is far superior in every way at any given weight that these guys would be lifting and it doesn’t create potential for muscle imbalances. It also translates to other lifts. The alternating grip provides absolutely no value to these athletes.
For what it's worth, I can consistently deadlift a little more weight using the alternating grip. What I'm thinking is problematic for me is that I always want to use the same alternating grip instead of switching it up, so I'm sure I have imbalances on one side. Never really thought about it though. Decent article on the subject https://www.crossfitinvictus.com/blog/case-mixed-grip-deadlifts/
I never thought a CIS post would change the way I deadlift, but I think I'm gonna just go hook grip exclusively now.