Okay Anet you need to rethink this whole idea, it may work in wvw overflow map (eotm) however it does not work for main wvw.
The issue with the temp server ally for the smaller sides is
1. Server A has main commander who wants to tag for his server, the ally server B also has their main normal commander that wishes to tag for his server. The result is allies are then fighting eachother for followers which creates an unhappy map and everyone leaves.
2. The idea of temp ally means there is not always time for people to get TS setup for their new temp ally before the week is up. So the bigger server still has the advantage since they dont have an ally to have to get setup on TS.
3. This idea increases the chances of alt account spying and seige trolling having a megaserver idea in main wvw.
Lets FINALLY admit the truth please anet, you hoped you were going to have more active players when creating gw2 and put in place far to many different servers for the amount of people you expect to buy/play the game. This quick fix to the problem of population balance is and has failed again. It’s time to do what you should have done YEARS ago, and thats DELETE the bottom two tiers. Once you’ve removed the bottom six servers you then offer them FREE xfers to the other servers to fill them up.
Over time we will see a REAL change to numbers in WvW and more people becoming attracted to the gamemode again. Do this and COMPLETELY remove the desert maps that are 70% bigger than they needed to be and we stand a chance to bring the vets/guilds back.
Please stop dragging your feet and start removing the amount of different sides/servers we currently have.