Yes i admit it's a very hard job (and for some people also very boring
) but it can be done on all shard if there is a comunity effort. On Siege, me, guildmates and other people worked slowly for all year on that. In the first months of the year, we just spent 1 hour per week filling large bods just to save points and in the meanwhile we collected bods most of days (and i think on prodo this part can be easier because you can have more char per account
)... Then by september ,we started to work harder on the project to get all stars. Some people help collecting resorces, other giving gold for bribing ( on Siege we spent 15 milions on that only in guild), others filling large and others just collecting bods and then giving them to people that were filling bods. As you can see it's a shard effort, require time and organizatiom, but isn't impossible
... We finished yesterday to get all points for full trees in all towns but it worth all the time spent because, if all members of a comunity do a little part, when you reach the goal, you fell proud to be part of a so nice "event"
Said that, if in the next years they will lower the amount of points required to get a full tree (25.5k bank points), i will not complain at all ihih