What's with all the rage over losing Tier II and III, etc.?

We haven't even seen how Black Mage is going to work. It could be that "Fire" for Conjuerer (or Thaumaturge if it changes in 1.20) scales with it's level, but Black Mage can get "Fire II" which scales as well.

Level 30 THM = Level 30 BLM

THM gets Fire that ranges from 100 damage at level 30 to 800 damage at level 50.
BLM gets Fire II that ranges from 200 damage at level 30 to 1600 damage at level 50.
(All numbers are hypothetical, as is the possibility of THM getting elemental nukes in 1.20)

So why complain about a system that you haven't had a chance to test and that you haven't seen how other jobs are going to affect it?