For those asking for the "elemental wheel" what one of the 3 wheels do you want BLM to have? Yes there is 3. In the THM guild The books on the desk can be targeted in read, in 1.0, and it gave a lot of details on elemental strengths. Fire melts Ice, Ice blocks Wind, Wind puts out Fire. Earth grounds Lightning, Lightning shocks Water, Water best Earth(forget how). And finally Light and dark best each other. This isn't FFXI with one wheel, keep the games separate, they are not equivalent but much beyond the name "Final Fantasy."
The actually Job WHM has only been in a few FF games, FF1(I believe it was 1, could be 2), FF3, FF4, FF5, FF9, and FF11. In FF1 WHM got Areo at least, it's been awhile since I've played 1 or 2. FF3 is where they actually added "Class change" and as you progressed you got more and more class you can change to, FF5 did this as well. FF4's party setup was story based and there was only 2 real WHM, Rosa and Palom. FF9 had 2 WHMs and if I remeber correctly, each had their own special ability besides just healing. THe first was your summoner. in FFXI WHM was Healer and if they weren't in a party as mentioned before could get a good club and does some decennt damage. The rest of the FFs has all characters able to get every ability, excluding FF13. And one thing that every game that has a WHM has in common is that the game is/was centralized around party play. FFXIV for the most part didn't centralize around party play. Nearly everything could be soloed until later quests with NMs or Dungeons. ARR seems to centralize around solo play with quests and leves to level up. With party play involving dungeons and the new FATE system. The new NM are hard to tell if they were part of the FATE system or not, but I believe I read they were part of the FATE system.
As these are my opinions I'm just saying my point of view on this matter. But as far as I see from 1.0 at end time giving WHM 3 elements and BLM 3 elements doesn't really do much to change how the classes them selves were portrayed in the past. Example is that I do not recall a FF other then 11 that gave Black Magic anything beyond Lightning Ice or Fire. In most of them if you wanted a Water ability you had to summon Leviathan or some other water based one, oh have Blue Magic use Aqua Breath or the likes.
Only Problem I have ATM with ARR is the broken lore of CNJ and THM. IF they fix the lore to fit what it currently is, Everything will be just fine and dandy. I think RDM should be the only class that can use all elements but significantly less effective then the natural class it stems from. My mere opinion.