R' Shneur Zalman of Liadi (Likkutei Torah, Pekudei 5b) explains homiletically that יֵאָכֵל is transitive: "matzos shall feed the seven days" - the latter representing the seven aspects that make up a person's emotional self. The Torah is saying, then, that these need to be suffused with the nullification (bittul) to G-d that the matzah represents.
He also refers there to another discourse of his (ibid., Tzav 13a ff), in which the two spellings of מצ(ו)ת are analyzed. The defective spelling, he says, refers to the matzah eaten on the night of Pesach in Egypt, a purely human effort; the vav in the full spelling symbolizes the "drawing down" (the usual significance of this in Kabbalistic thought) of the revelation of G-dliness that accompanied the Exodus, which indeed wouldn't allow for the dough to rise.