What are YouTubing?

[Bounty Hunter Lani]

I'm pretty sure he took to a different style for this song because it's a song for an MMO.
He actually didn't know how it'd sound during an MMO-style battle, since he'd never done MMO music before (According to the soundtrack's wiki), so it is different. 
Still, it's not a bad song at all, and I actually love it. During battle, it's actually pretty great, too, and the way it loops keeps the feel throughout the battle. 

And I don't get what you mean by "loud sounds", because many Final Fantasy songs have those. The older ones had to use the PS1 and PS2's more synthetic-sounding production, so if they were to have been produced "Today", it would sound more orchestral and with those "loud sounds" you're referring to. If this were to be in an older style, it would be different as well. 

Nothing's wrong with the song at all, in my opinion.   

I do think a lot of songs these days sound terrible or generic, but this one is far from them.

EDIT:
You could listen to the orchestrated versions of the older songs if you want, they do sound different than the final product. Still sound great, too!