Those were awesome. Was a weekly blast.
Constant PUG raids where you invited as many as possible, and people burned through Emerald Nightmare, Trial of Valor, and Nighthold.
People got transmogs they wanted, gear for their alts, grats for the odd Legendary... and even if you got nothing you wanted, you got TONS of AP, so you ended up considerably more powerful for your trouble.
it was a blast. The World Tour PUG raids were one of my fondest Legion memories.
I wish they'd come back.