This is a much smaller set of changes and differences than the Druid’s near-total overhaul.
Most of these changes are just implementing new features or correcting where the older book had left out the possibility of being unarmed.
Personally, I think anyone who played BG3 with Lae’zel in their party knows how dominant a Fighter can be, so there wasn’t a lot of need to fix this class.
“Wasn’t broke. Didn’t fix”