Yeah, I agree that the later high level "math fixes" completely unneeded
Depends on your game. Specifically, an issue was that parties without enabling leaders got made and then the PCs didn't have any to-hit bonuses. And because there were a lot of '+stat' options out there instead of say +3, things get a little messed up.
There are three things they needed to fix:
Multi-attacking damage - make bonuses generally per W rather than per damage roll and lower the benefit
Get to-hit/defenses where they're leveling up appropriately. Quite honestly, though this probably would have triggered all sorts of crazy responses, they should have just made a base 'here's your to-hit score and add level to it' that automatically went up, ignoring magic items, stat boosts(which would still add to damage), etc...
Kill with hot fire any +stat/-stat bonuses/penalties to actions and change them either to +3/-3.