It is important to remember here that Pandeism is a metatheory. It is not a set narrative like that of, for example, Christianity or Islam or Scientology, where a sequence of events is recited and purpose is explained for them. Instead Pandeism simply proposes the possibility of a Creator becoming the Creation in order (most likely) to experience existence as the Creation.
So, in such a scenario, did the Creator know what would come of its radical kenosis? It is not possible to know; it is only possible to consider the range of logical possibilities. It almost certainly must have intended for consciousness to evolve within this Universe, because it requires meticulous attention to physics to make it so that it gives rise to the series of increases in complexity needed to yield consciousness.
And as to the question of whether an omniscient being can be curious -- consider this, before our Universe existed, the Creator could have no experiential knowledge of things like fear of the unknown (and, conversely, of courage in facing it), of loneliness, of discovery of new things, of being surprised. It is literally only by existing through the lives of non-omniscient beings that it can possibly acquire such knowledge. Omniscience thusly presents a paradox, and so it can not be claimed that the Creator ever really is or was or could be omniscient, but only that it had knowledge sufficient to set forth a Universe which would solve this problem.