When I saw the title of the article I thought "oh good, Yahtzee is going after Final Fantasy boss fights." Well he doesn't because I seem to have forgotten he's allergic to JRPGs, but here's my problem with boss fights.
I actually liked FF12 and 13 but I think Square Enix has forgotten how to actually create a boss.
In FF4, your first boss interacts with you. A disembodied voice asks you to turn around or face an ass whoopin'. It sets a tone of "oh shit, it's in here with us" and even better, puts you in a situation where you have to kill something that doesn't seem to be all that evil.
Also in FF4, you tangle with Golbez and his far-reaching schemes and after much effort and drama he is defeated and his secrets are revealed. Big shock, Golbez wasn't actually the source of all evil in the world and you must travel to an even further off land to find him.
Bosses used to have buildup. They were developed characters that you HATED because they killed Aeris. Yeah. Everyone razes villages, but Sephiroth made it PERSONAL. You bred chocobos just to smack that bastard in the face with Knights of the Round. And it felt GOOD.
So, FF13. Traipse along, and suddenly something with lots of HP comes by. Who the hell is that? OK it's dead. Just like all the other random whatsits around here. Hmmm. Next.
Worse, in FF13 you finally kill Big Evil and...he turns out not dead. He goes right on doing what he's doing in story mode as if you'd never killed him. Way to mug my sense of accomplishment, FF13. That Asshole had 3.6 million HP and I stopped him...yet he keeps going? I know rallying in the face of hopelessness and despair are motifs central to the FF13 storyline, but couldn't you at least show that 3.6 million damage hurt him? Can we at least reduce him to a feeble-bodied escape where he swears vengeance?
So, Square-Enix, let's review. Bosses are characters that we want to take down, and hard. They need development and dastardly deeds. I know you're worried about sales, but giving bad guys these things is free. Setting defense values and HP totals way above normal does not a boss make.
P.S.: Kindly refrain from that bullshit in FF12 where bosses are mighty because they just ignore your defensive items. That's cheap and removes our reward for 1) grinding to get those items and 2) working hard on the mathematics to break the game.