This a thousand times over. Casters are the last subrole with a meaningful distinction within each job (both in terms of gameplay and especially the utility they bring).
People lament the homogenization of jobs... but then make a fuss over the rez. Bringing or not a rez caster is a meaningful choice with pros and cons right now. No role has something comparable to this. We should cherish this.
Balance is messed up, but it's not hard to give RDM/SMN a 2/3% overall buff without changing how raises are distributed (SMN with the slower rez, RDM with chain rez, BLM and PCT with no rez, tho PCT has the aoe shield instead).