I'm pretty sure you and Trol will be the only ones who support it. If people have a very slight interest in the current universe, a new reboot will end DP once and for all, since people will not want to start what they did all over again.
Plus personally, I dislike Warcraft by now, so returning to Warcraft's universe in the roleplay is seriously an act of degradation. I did have a reboot idea, but I put it on the shelf, for same reason I mentioned before. A reboot would make people lose the remains of their interest.
Personally, I find using a thread to be much worse. For one thing, a group seems solid to people. It's something that lasts long, something that remains. Threads are bound to be deleted eventually, so people will rather be disencouraged by using a thread instead of a group.
Plus using a thread means that there is zero regulation of who writes in the group. Anyone can come in and start posting. And you are the only one who accepts all roleplayers, despite of how stupid their character and roleplaying may be. The rest... are really pissed off by that.
The notification of new messages in user CP and several pics per page are perhaps the only good features I see about it. But not worth it if you ask me.