No Instances is going to create another empty zone/dominated by few. People want to accomplish their goals not compete for them.
I see how you are looking at this and your idea is a great/exciting one (community event), just not for this zone.
Let's try to remember this is for charms. I don't remember where Fugitive posted it, but he said something along the lines of:
"Why so much focus on an outdated item with outdated stats when so many newer/better items have been introduced"
Sorry for the butchered misquote Fugitive
The members with load of UC's should be able to go to floor 6 and knock out a new UC in 1-2 days; it's trivial to them.
ToFS is open!
Rofl with every mob camped on 1st floor for last few hours is ... kinda .. well
shrug
lol no instances..chaining ones leg down to attempt to slow progress or make it look hard this isn't fun