Well in your post on the first page, you said that 14's rdm was just rdm in visual so I was attempting to counter that point. I do agree with what you said here though of wishing that rdm was more. Still, the fact is that it is a rdm job though just using the definitions for white and black magic as they are in 14's world.
To myself and others, a blue mage just needs to use enemy skills. How you learn them isn't too important since there's been various methods in the franchise. You could keep the current method or just have full blu unlock after completing a certain stage of the carnivale.
You have a point that future expacs would mostly be blue mage going out and learning a few new spells that would function as the updates many jobs are seeing now. Functionally the same ability/spell but with higher potency or becoming AoE with fall off damage. Those of us asking for full blue mage understand that and still desire to be able to main the job in the content that we want to do.
That's fine that there are people that enjoy blue mage as it is. There are not many on my side that want limited blu to receive no future updates or be scrapped entirely. Right now we have blue mage "side content" in the game and we would like to have blue mage "the combat job". Some of us would engage more with the current blue mage content if it didn't come with the price tag of the job we want to play as being used as the delivery method for that content. We want to see that be changed. That could be some kind of toggle to switch between the two modes, a completely separate job stone, or just have the full version of the job be unlocked through some completion of the limited content.
Like if beast master was added as a limited job in 6.4 and they also announced that completing the limited bst content up through say level 80 would allow a balanced version to be used as a full job come the 7.0 expac then you would have many on my side say that we can accept that.