It's a bit weird that its not already been done since this was due to a problem way back in 5.1 (Because people could do Firmament fates in another world locking out those on their home world). The Firmament is over now so that problem no longer exists, so shouldn't we be able to visit our friends now and check out other world statues?

If its to do with the Fetes and preventing abuse for prizes, maybe it could just be limited to those on their homeworld, but as for actually entering it, I want to be able to go say hello to my friends who's crafting in there to level up and drop off some mats for them if they need it.

I am unaware of other datacenters, however I can say for sure that my world most likely represents the other worlds on my datacenter - its currently empty most of the time and sees a spike increase of people when a Fete is about to start, but nowhere near enough to be a congested zone.