Well if you look on most campaigns even during the top hours only Thornblade is full and most of the others have the population set to low, dont think we will have a problem with over populated campaigns anytime soon.
Actually, this weekend Chillrend (14 day campaign) was also population locked. Haderus had a mix of 1 and 2 population bars as well. Not sure about the others. As this is the most populous I've seen the campaigns in months, I could definitely see them adding more campaigns with the release of TU.
Gore-of-the-Forest Argonian Nightblade Wode Earthrender Breton Dragonknight Ceol the Last Baron Redguard Dragonknight Wayra High Elf Sorceress Erebain Salothran Dark Elf Templar Rituals-of-the-Forest Argonian Warden