It's working for me so far, with moderate supervision and corrections.
I did DK starting area with no real issues other than one finishing the quest first and waiting at the quest turn in POI and spamming interact (I think there is supposed to be a small delay on this). Also there were about 3 times where the 1st toon to turn in the quest did so and then ran off before the 2nd toon was able to turn it in, so I had to stop Toon1 and move him back in range and then restart him (could probably be fixed with a short delay after seeing the party member in range, before actually turning in the quest).
I also leveled a rogue/druid together from 5-15. Same race, having the same travel speed definitely helps. The druid was always waiting for the rogue to show up, he dicked around trying to mount or go into cat form long enough that the rogue was able to turn in quests, only issue I had here was 1 going to repair and/or mail items while the other one was out killing things and finishing quests only to end up at the quest turn in point spamming.
I recently leveled two toons through Dungeon buddy/RAF which worked amazingly well and was pretty much entirely unsupervised, and was about 2days /played to 80. I think if I was able to queue as Tank/Healer it would cut down on the time between dungeons, which might be worth testing out for some people. Unfortunately, they are 81 and broke on a new server, so their farming days are beginning sooner than desired. I want to level 2 toons through questing/raf as a comparison for time and also to have some gold on hand from completing quests. I will continue to use this with moderate supervision and see how things go.
