I don't think the problem is the number of changes that make jobs or abilities worse so much as the lack of thought put into some of them.

"Beastmaster pets and Thieves are pretty much the same in terms of Treasure Hunter. This is a problem. Let us do absolutely anything other than make high levels of Treasure Hunter and the time required to accrue them worthwhile!"

"Save TP is too strong in Voidwatch. This is a problem. Let us make Miser's Roll worthless outside of Voidwatch!"

I agree with their assessment of the problems, but I feel like they went out of their way to achieve the worst possible solutions.