A bit of a late reply but I will post my thoughts.
Rez should be taxed, at least I think so, theirs a argument to be said if DT will have "body checks" but even in situations where theirs body checks quick rezzes and having a caster able to rez will always be more valuable in Progression then yes. Also It should be balanced with black mage considering raid buffs, I'm not saying that it should deal similar amounts of damage to BLM but the total dps (including pictos raid buff calculations) should be very similar (Picto should be in similar lines of melees who provide a buff, while BLM Should be in a similar spot to Samurai).
If we had Summoner and Red mage do the same damage as Black Mage or Pictomancer their would be a massive reason to never pick either Black Mage or Picto theirs a clear reason why neither are usually above Black mage, I don't think they should be.
If they want to remove Caster rez I'm more then happy for both to do similar damage (Well Summoner should debatably get more casts per minute if we want to be fully fair), but I'm not aganist or for this, simply I'm just against Red mage having rez and doing similar numbers as Black mage currently, I mostly play Black mage anyway so it doesn't really effect me.
I guess this is walking the tight rope of homogenization where all jobs in a category have to bring very similar things on the table or high end players will be upset about numbers if things aren't changed, while on the other end people will be upset about taking uniqueness theirs always going to be trade offs to keeping rez or taking it away.