I pitched in my dislike of the do over saving rolls for humans. I understand the reasoning but think there is no problem to fix, it is not about balancing out and it just goes against the grain.
As for the 'loss' of negative adds... No big deal, it didn't feature much but here's a hypothetical fight:
Weebo and Norm get into an argument at the county donkey fair and start shoving each other. There is a big pile of donkey droppings and soon this is the aim of each of the shovers - to deposit their adversary on the pile.
They both have adds of 10 for everything - except that Weebo has a STR of only four.
In the Beta Universe, he has a 50/50 chance of winning, That does not seem right! He couldn't punch his way out of a wet paper bag.
In the other Universes (5.5. and 7.5), Weebo would be a pushover, needing to roll a 6 to get any go forward while even with a roll of 1 for bare hands Norm would match his puny fellow donkey lover.
So are these other Universes boring no doubt places? No - because Weebo knows his weakness and goes for stunt attacks, like jamming his thumbs into Norm's eye sockets, and the possibilities are endless.
As they are in Beta-verse... just like to call a spade a spade or a wimp a wimp.