im also not planning to get a Mojo my self. But its was painfully easy to support it, and since both my games got confirmed working (and they are quite good testing them, much better than Apple do). So you should supports for Ouya Everywhere.
Its very easy. Just add the DEV KEY to the Strings.xml and update to AE2.3, that it. Its only a option if you want to uses buttons names (which is very easy too). So no big work.
So its was a much easier console to write for, even im newer owned it, but its not require, since we have Ouya, and Ouya Everywhere ODK was well writting (do make sure to got replaced the ouya jar file of course).
So im would not against him to get a Mojo instead of Ouya. Both works fine.
PS. Ouya Everywhere does only remap buttons to uses Ouya standard. But im did choice to cap the surface to uses the resolution choocen for Ouya. But that is not a Mojo issue.