Yes, I am aware of that. However, it would have made much more sense for several different reasons to do the North-American bit now; there´s really no need for two North-American legs, however short this one may be. I don`t reckon this Future Past theme is particularly interesting there given even how little the tickets have sold for these handful of shows. Secondly, now that Bruce is doing his solo tour next year the calender and options are limited for Maiden. Doing the N-A bit now would have opened space for different parts of the World next year, including 2nd leg of Europe. As much as I like the theme, I think it would be the best to wrap up the Future Past by the end of next year and focus to other things beyond that. There is limited time for Maiden, and I don`t wish to see the same type of show expanded to third year.
Avoiding a year-long gap would be better also, playing for a couple of months now would not be unreasonable request, there has been enough time to recover from the summer tour, and really no need for more than 8-week tour in NA (sorry for the HC-fans out there for this opinion). Unless they do a short tour somewhere in February-March, they are probably only gonna be on stage next time in around September.
And finally, a hypocritical point: avoiding "unnecessary" (I hope you know what I mean) travelling for only handful of shows.