Oblique photos helpful in MME

Yes. Maps Made Easy's processing will choose the most appropriate image to texture the model's faces. If there is an image that is closer or more orthogonal to a vertical face it is the one that will be used. It can take some experimentation to make sure you are getting the right amount of overlap for non-horizontal surfaces. 

Just be sure that you are not including any shots of the sky or horizon. That is the best way to get a job to fail.