Regarding Inner Moka's new form design, I just hope that this form won't be a one time thing, since I think those wings ... and those black ... parts on her legs, kind of suit her.
In Tsukune's case ... well I might say a similar thing as well, assuming that Ikeda gets a little better in connecting his face with the rest of his body, so that it would become a little more "natural looking", at least from a frontal perspective.
Of course, it all depends on the benefits that this form could provide to them ... with the most important one, being the possibility of them being capable of staying in the air for some longer period's of time, since I don't think that the wings they have is just for decoration.
But, it probably has some other benefits as well ... like an increase of the power that both of them can use, assuming that those forms, work in a similar way as Kahula's, after she removes her limiters.