Heroic only mechanics in Hellfire?

[Krazzorx]

Looking over he dungeon journal I found this odd entry on the first boss:

Felfire Demolisher (Heroic, Mythic)

A mob that appears in heroic but not normal?

[Totaltotemic]

They've been systematically nerfing Normal BRF ever since it came out to trivialize some of the more difficult mechanics on Normal (for example, add waves only come half as often on Beastlord and Blast Furnace).

It never really made much sense that Normal had exactly the same mechanics as Heroic when it's designed to be the same but easier. It was like that in SoO with Flex/Normal because Normal was just not flexible, but with these new difficulties it's kind of awkward that you move up from Normal to Heroic and the fights don't change at all in Highmaul, but now they do in BRF after a bunch of hotfixes.