Well ANET you need to look at WvW and spend a little time on each server in WvW and does not need to be very long just long enough to see how and what is going on in WvW and the coverage for each time zones. SEA, EU, Oceanic and NA for better understanding on relink pairings for future server relinks.
Maybe it is time to open more tiers based off server coverage and server populations to help with a little balance.
There is on NA based on https://wiki.guildwars2.com/wiki/World
10 Full Servers
4 Very High Servers
6 High Servers
4 Medium Servers
Some of the full servers have massive coverage in all time zones. So these one should not have servers linked to them at all.
Some of the full servers great coverage but in all time zones. So these can be paired with High Servers or Medium Servers to keep little of balance.
Some of the Very High Servers great coverage but in all time zones. So these can be paired with High Servers or Medium Servers to keep little of balance.
Devona's Rest 1 — Medium
Isle of Janthir — Medium
Kaineng — Medium
Sorrow's Furnace — Medium
Borlis Pass — High
Ehmry Bay 2 — High
Eredon Terrace — High
Gate of Madness — High
Northern Shiverpeaks — High
Stormbluff Isle — High
Anvil Rock — Very High
Sanctum of Rall 4 — Very High
Tarnished Coast — Very High
Yak's Bend — Very High
Blackgate — Full
Crystal Desert — Full
Darkhaven — Full
Dragonbrand — Full
Ferguson's Crossing 3 — Full
Fort Aspenwood — Full
Henge of Denravi — Full
Jade Quarry — Full
Maguuma — Full
Sea of Sorrows — Full
It will never be perfect but if the pairings and matchups are better picked would be nice.