No offence but, really? I saw the words "Save To" and thought, "yeah, that's how I do it."
Even though there are some stupid coments made by stupid people, I think they should keep it becuase there are still people who make genuine coments that talk about the video that the uploader has made/uploaded - if the uploader has a problem with any coments s/he can delete them - infact you can even set things up so comments will only appear after you accept them - that's a top way to avoid spam.
To be honest, I think, your all kind of exagerating; The worst part about this new lay out is that it is some times hard to spot that a particular coment is a reply to another (unless, they have "@Whoever" at the top). Bottom Line is, I still love YouTube - It's doing mostly fine, at the moment - and what it does wrong is down to the comunity.