It's just a bit too small right now, lots of communities that don't exist yet or are barely active. I do think there's potential here though. I'm not the most techsavvy so I don't really understand the whole fediverse thing, and I think that's the thing keeping a lot of people away. Once you're here though it barely matters.
I recently caught up to one piece! here's my personal ranking of all the arcs :)
marineford
enies lobby
arabasta
egghead (as of 1086)
levely
skypiea
wano
dressrosa
whole cake island
zou
water 7
arlong park
fish-man island
impel down
post-war
post-enies lobby
amazon lily
punk hazard
sabaody archipelago
whisky peak
long ring long land
return to sabaody
baratie
thriller bark
little garden
loguetown
jaya
reverse mountain
romance dawn
drum island
orange town
syrup village