Because there's just not enough troll content.

Any post or article on the internet is fodder for troll content

If all blizz was going for when picking new 5 mans was racial diversity we'd see nothing but gnome instances for a quite a while, and I know that's not a future any of us wish to contemplate for long. This isn't even "more" troll content since it's just updated old content.

I'm just happy there is more troll content because, for all the times we've fought trolls, done troll dungeons, and reported to troll villages, we still know next to nothing about them.

I mean, the troll dungeons we've had over time (Zul'ferrak, Sunken Temple, Zul'Gerub, Zul'Aman, Gundrak Keep, Drak'Theron) we've mostly encountered trolls going AGAINST type and summoning their gods by force before consuming them. The ONLY time we've fought a troll divinity that wasn't perverted by the trolls around it was Ghaz'rilla, and even that one was a servant of the old gods.

We've defeated the greatest hero the trolls ever had (with little to no explanation, I might add), and took his stuff, and it was pretty much the first time in WoW that the quests were 'those guys have shiny things, kill 'em at take the shiny things' as a story device instead of a mechanic or incentive.

What I want is a developed troll story line with an epic raid or dungeon that tells us either what trolls HAVE done (like the wars against the Slithid), or what they're doing that's new, WITH an explanation.