Personally, I thought the place was fun. No dumb trash to rifle through, and yeah, the scenery was bland and redundant, but that was minor all in all.
Idea:
ToC starts out with a jousting boss (they could tweak it to make it more interesting... different types of horses like with Occulus), then Faction Champs. Then we'd have the twin valkyr attack (not be part of the tournament). At this point, the Argent Crusade, rather than being complete scrubs, would send some story character along (or Tirion himself) to aid us. Finally we get them down, and when they die, they blow up the arena which drops us straight down...
the Nerubian kingdom. Here we'd fight our way through tunnels fighting trash and bosses. There would be three more bosses-
Big Evil Spider of Doom (name pending)
Basically, think of the LK fight in HoR, except every so often, we had to stop and fight the boss by attacking one of his legs and crippling him. Then we'd run away. Unfortunately, in our haste to run away we end up going deeper into the tunnels.
Here we would fight more trash and and face not just any old nerubians, but nerubians corrupted by Yogg Saron - so with extra tentacles and such. Eventually we'd face a big old faceless one (or a forgotten one maybe). When he dies, he whips out a tentacle that breaks open a wall revealing a breeze of fresh air (so told by the story character who does like 200 dps despawns when everyone's dead). Aha! This must lead us outside.
As we follow the tunnel towards the surface, we encounter a corrupted Anubarak with tentacles and extra-spider-ness to boot. We fight him and finish him off. Tada!
I'm kinda rushed to get into the fight details, but this way we could have had a spider raid and still had your tourny...
Just my two cents.