IF they want to add solo timelines to those zones, it should definately be via NEW stuff added not old stuff nerfed to oblivion.
Believe it or not some people ENJOY grouping with one or 2 other people in these outdoor zones doing quests and things. Taking away all challenge and making everything solo mobs does NOT help the game overall. (Even Commonlands still has the occassional herioc/epic mobs, I assume there are a couple left in Antonica as well though I haven't had a newbie coming up through that area lately).