I use the abandoned on all quite a bit, especially when leveling new characters. The single abandon quest did give issues but like you said was a Blizzard issue and is being fixed in 7.2
Regardless, I EXTREMELY (focus on the caps) appreciate this addon, it makes multiboxing so smooth and is a requirement for WoW.

Just saying thank you when I can, to let you know how important it has been to have this addon continually being updated throughout the years.