MSK might be better reserved for MuSKeteer. MKN Mystic KNight? MYK MYstic Knight? SPB SPellBlade?
Didn't they say that from now on all the new jobs will be pretty much Reaper style jobs that are unique to XIV?
I absolutely would, personally. I haven't been vocal about it but it is something I've been wanting for years.
Realistically they could just make everything deal magic damage and have the elements be the core of the job's gameplay identity. (As in, the elements would be enhancing your abilities. Whether it's raw potency, debuffing the enemy and making another element more powerful with said debuff, building towards a much stronger burst potential, etc)
They might. New jobs always get played at lot at release. The elemental resistances had been removed as was mentioned but making enemies weak to the next element you use could work. Basically it would boil down to: apply the appropriate debuff and then go in the phase.
I'm neutral to if we get such a job or not... but since my brother doesn't visit these forums I will speak for him. My brother is desperate for a "Spellslinger" job / class. Basically Red mage, but more of the focus on melee, and a short window for range / magic. It also for some reason has to be a sword preferably 1handed. As enhancement shaman from wow, Death Knights and or Paladins "is not the same". Oh and the magic has to be exclusively like elemental like arcane / fire / ice / lightning kinda of stuff.
What you described as wanting is just Red Mage/Ninja.