Hm, considering how two Nutaku games has gotten English-exclusive characters now, it looks like they DO want to hear what original (as in, not DMM) content we'd like to see in Aigis, even if it would be harder to implement unit here compared to cards in other games...
At this point, Angelic Saga will be getting more Nutaku exclusives since the DMM version is closing and the dev team is focusing on this version.