I really like the new Ragnaros fight.
I'm not 100% sure why though. It's not too stressful. There's some randomness, notably where the hammer lands and where the engulfing flames appear. But the randomness is very controllable.
I like the Sons phase. It's a nice nod to the old fight, with an interesting mechanic. Plus, I get to Hammer of Justice something.
The pace of the fight moves nicely, and the last phase (in normal) builds to a nicely chaotic ending, as there are lava waves and giant boulders flying around.
In some respects, it reminds me of Moroes back in TBC. It's a fight that you win because you do all the little things right. You keep the raid healed up, you dodge the fire, you burst down the Sons, you pop traps appropriately, you kite meteors properly.
It's very much a fight that when you beat it, you know you deserved to beat it. Your raid gains mastery over the fight as you learn it phase by phase.
About the only disappointing thing is the lack of RP with Ragnaros. I loved the old Ragnaros RP to start the attempts. I'd quote it along with him and Majordomo Executus when we first the triggered the fight. In fact, I'm going to quote it in this post because it's just that awesome:
Majordomo Executus yells: Imprudent whelps! You've rushed headlong to your own deaths! See now, the master stirs!
Majordomo Executus yells: Behold Ragnaros - the Firelord! He who was ancient when this world was young! Bow before him, mortals! Bow before your ending!
Ragnaros yells: TOO SOON! YOU HAVE AWAKENED ME TOO SOON, EXECUTUS! WHAT IS THE MEANING OF THIS INTRUSION?
Majordomo Executus yells: These mortal infidels, my lord! They have invaded your sanctum and seek to steal your secrets!
Ragnaros yells: FOOL! YOU ALLOWED THESE INSECTS TO RUN RAMPANT THROUGH THE HALLOW CORE? AND NOW YOU LEAD THEM TO MY VERY LAIR? YOU HAVE FAILED ME, EXECUTUS! JUSTICE SHALL BE MET, INDEED!
Ragnaros kills Executus.
Ragnaros yells: NOW FOR YOU, INSECTS! BOLDLY, YOU SOUGHT THE POWER OF RAGNAROS. NOW YOU SHALL SEE IT FIRSTHAND!
Sadly, Firelands lacks anything this stylish (which, to be fair, is a really high bar). Apparently some crazy stuff happens in Heroic mode, but that's Heroic Mode.
So that's Ragnaros. Awesome fight, but I miss the introduction.