I'll go against the grain here I suppose and say I mostly agree with OP. I think there's plenty of stuff that's been announced so far that I'm pretty excited about, but what gets me is
there are no dates. Very few Switch titles right now have solid launch windows, and even fewer have actual dates. That's what I'm bummed about mostly. Right now the only things I can get excited for that actually have dates attached to them are Mario Kart 8, a game I have already played extensively, and Puyo Puyo Tetris, a game I have already played extensively. Other than that it's anyone's guess.
Yes, E3 is less than 3 months away. Unfortunately, E3 is still months away. It would be great if Nintendo put together a 30-minute direct in the next couple of weeks that did a couple things. One, I'd love to get a date for ARMS so I can start being hyped. Is it still coming out in Spring? Late May, early June? A Splatoon 2 release month would also be great, a date would be even better. Then any dates or windows they can confirm would add to the hype. Finally, maybe tease some new footage from Mario or something.
But really, just give me some dates, I don't want to wait until June