I love New Order as much as I love Depeche Mode but let's be honest, Depeche Mode has a solid song bank, and been consistent for over 20 years. They are still pretty huge in USA and can still sell out stadiums in California, Chicago, and New York. They are not quite washed up yet. Regretfully, I'd have to put New Order closer to that category even though I think they're a lot better than the Aragon Ball Room.
In USA New Order and Depeche Mode have practically the exact same fan base, but Depeche's base is larger and more loyal. While Depeche may be slipping, having New Order would energize the fan base. It's kind of like the hard rock bands in the 80's, none of them could play a stadium alone, but you get 5 or 6 of them together and the rockers get interested in that kind of venue.
I understand people giving up on New Order with their short 45 minute concerts, and no album that has moved the base since Substance in 1987 or maybe Technique. Admitting they hate to tour turns off fans, we want to see them, they are our heros to us. I took a lot of shit in high school for them just for being a fan. Depeche on the other hand loves touring.
I still think NO & DM together would be a solid concert and they could help each other. I know Hooky loves touring. Especially when he was single. (Married now isn't he?)