Haven't watched the above videos as I don't really know what happened at E3 on the whole, so I don't have much context for reviews of the expo. Nintendo Direct aside, I skimmed through the Ubisoft and the VR videos, watched the Wholesome Direct in full and got out of the Capcom video toot-sweet. It's cool to see a Sam & Max VR game (seemed like an escape room rather than a point and click adventure), and pretty much all the games shown in the Wholesome Direct looked worth sticking on my Switch wishlist if/when they come to eShop provided I remember about them. But as tired and cliche as it may be, games are by and large just the same year in and year out so it's really hard to be wowed by the next big Far Cry or whatever when it's just a glorified iteration on what's been seen before. Woo.
I'd have to look into it to understand why E3 has gone sour, but I think it'll hang around in some form--if it has to reinvent itself that's fine, it's 2021 after all. E3's the focal point of the gaming year and that Summer Games Fest by your man from the Bonus Round wouldn't be using it as a springboard for his latest little business venture otherwise.
Also, it's not E3s fault if these companies have nothing to show. They shouldn't have booked their slots or cut their videos down in size.