If anything, it's rPhys that needs help, and has always needed help. The infamous mobility tax you know. Having them slightly lower by design for casual content and prog balance is all fine and dandy, but the fact remains that almost immediately everybody else manages to still deal more damage output no matter what.
Back in HW and SB the mobility tax was conveniently hidden behind the DRG's piercing debuff, which was still provided by the DRG and not by the ranged physical jobs benefiting from it, but people still took those jobs because rPhys identity back then was to buff the party in MP and TP resource management, which was rather important. In ShB and now EW, this is offset instead by the party bonus that having a single rPhys in the party provides, so you'd take them as long as the mobility tax is refunded by this (though getting more than one rphys job is suboptimal by that very fact). In fact at ShB release the mobility tax was so huge that it became actually meta to remove rphys entirely from parties and go double melee double caster, although not many did that ironically for... well, their results on a certain website. Until the tax got reduced.
The problem isn't on MCH damage, the problem is on the mobility tax, which is also affecting SMN amusingly enough now.