1. I'm not saying that MS will blow peoples' minds, but if I had to guess between them and Nintendo who has the better chance of doing so...Everybody loves Nintendo at E3, but people forget that they really only have two E3 presentations (2004 and 2010) that are pretty much universally considered to be amazing.
2. I wouldn't say Nintendo won E3 with Zelda when it was literally all they had to show. Was it the best game AT the show? Yes, but you just can't compare it to Sony and MS's showings. Quality means more than quantity, but not that much. As for first party games, that's all well and good, but Sony and MS don't make as much first-party because they don't NEED as much. They have plenty of third party releases that people want to play, games that 9 times out of 10 will not even appear on Switch.
3. Boring to you, yes, but for the average dude who just plays 1-2 games a year, that's what they want to see. They're the among the biggest selling games of the year for a reason, y'know.
4. I'm actually not underestimating Pokemon at all, it's a huge franchise with a gigantic fanbase. But it's an enhanced console port of a 3DS title, and I'm a bit concerned as to how much more enhanced it will be.