I like where you are going with that Lupusceleri, bump ^^.
The only real strikes against server merging are player citys, tower sites and duplicate names.
If a solution to those was implemented they could freely merge the servers.
Possible options:
German server could easily gain an "OT German OOC" and etc like the current japan ones, that I never see used...
Expand the planet map for more zones and reworking under used zones.
Tally all city locations and in the expanding of the map put in an equal or greater number of sites. As well as spreading out over-crowded areas.
Credit all city owners with a voucher that can be used on any unclaimed site and then wipe all cities.
For a period of time city plots could only be claimed by using the voucher.
Once that time has passed open all remaining plots to regular forms of claiming.
Do the same with tower sites, maybe make them not open to attack during the time period where they may be claimed in this way.
While doing this maybe relocate a few that are too close to high traffic player areas, or make the tower sites level range have a significant gap to the playfield.
I.E. if you are an omni playing in the area between barracks and omni ent at levels where the mobs are yellow/green you will end up getting 4 hour flagged on those towers unless you leave auto attack off.
How many new players are we scaring off when they get a flag and then chain ganked in and around subway? Any number is too many if we are trying to grow.
As for the name thing, only real solution would be to set EVERYONE to a defautXXXX and let them /petition for new ones