It's pretty obvious why they aren't having Directs right now.
1) The first one will be ignored in favor of the discussion Iwata's death had on it. Release a commercial where everyone ignores what is being advertised to them, that's a good idea.
2) There's probably still a lot of people who simply do not know what to do with it now. The president (and, more importantly here, spokesman) died. It's going to require a decent bit of market research and surreptitious polling to figure out what they should do with it now. It should go on, but in what form? You bring it back the wrong way and you've crashed that train forever.
3) They don't have anything to show. Bring back Nintendo Directs, the first since Iwata's death! This'll be amazing, people are so thirsty for one! ....oh, it's Twilight Princess HD. We knew about that through datamining. Oh, it's Fire Emblem with english voices, big whoop. Oh, I guess that Pikachu Detective game exists, there's a Pokken date, another Smash DLC character, we waited six months for this?
Wii U and 3DS development is winding down. Well, it's wound down, there's likely few if any major announcements down the pipeline. They aren't talking about their new system yet, which will be similarly anemic in the first few months because it's Nintendo and that's what they do. They simply don't have shit to show right now and they have even less shit to show before the NX is revealed than they do after.
At this point, better to keep your mouth shut and be thought a fool.