Mhh.
All rotation i know (standard) use ice spells. Otherwise can you not obtain the ice shards for reduced mp cost in fire.
And i mained the blm to for a long time (think about it to switch to drg). And i didnt heared, that only ice will reg mana.
Only, that ice will now have a fixed regeneration number, so, that its not based on the tick.
I can not image, that the mana reg will completly stopped. Because every other class has a naturaly mana reg over time to.
It doesnt look to make sense, to remove that completly from blm.
What the blm has yet was a increased power of that reg. And that is, what is changed now.