Yep. It is the only way to balance the stat.
If they do not do this it will always be crit / DH with det to fill in caps.
They are making the game far too homogenized. As it is everyone uses the same materia.
If they did this it would help some classes more than others making the gearing more diverse.
Classes like DRG with lots of abilities would get large benefit out of it while classes like MNK who have much fewer cooldowns would get less.
It needs to be only DPS or heal abilities like jump, contre sixte and fleche and benediction / tetragrammaton though.
If it is cooldowns like litany, shake it off or largesse it would make every class gravitate to it equally.

They should also make determination scale with potency so classes with big hard hits would get more effect opposed to classes with quick smaller hits. This would add more diversity as well.