Icecrown Open World Thing

Hello so i was thinking about howmany people were hyped to have back that event you did with the world bosses.
And yes many of them were hyped just because the frost emblems grinding, but there are people that liked the idea and liked to raid have fun pvping in massive groups just like i did.
Here i would ask you is it possible to make anything similar with some maybe cosmetic stuff or anything with really low drop chance instead of "frost emblem" and make that event a permanent? I believe something new in the current 3.3.5 expansion would not hurt anybody and think many will be happy to have.
I heard that u had crashing problems because of that event (cmon like we dont have server crashes every day), so i think it can be fixed or improved.

I would also like to see frequent custom events to make players visit old zones.