Disclaimer: This is my first comment on HackerNews and probably my last. I'm not a hacker or a software engineer and don't really belong on the site, so don't comment. I'm just some random guy who plays a lot of video games, uses a lot of reddit and has a rough interest in the technology industry. By extension, I watch a lot of YouTube videos from various channels that offer playthroughs (or 'Let's Plays') of games. This is why I say the following:
Unfortunately at this stage I think you are completely wrong. I suspect that you don't use YouTube very much and so are not seeing what has happened. I'm sorry if this sounds snide, it isn't meant to.
YouTube had a reputation with some as providing the worst internet comments outside 4chan. I doubt few could imagine it getting worse. This recent Google+ integration seems to be an experiment on Google's part to prove how naive that belief was.
You can now post hyperlinks in comments. This has led to people spamming links to 'screamer' videos, including the potential to disguise these links as the comment expanding feature. Comments can now have seemingly unlimited length, or at least are massively extended compared to the previous system; This has led to people spamming ASCII art images of genitals, pedobear, naked women, memes like the super shibe 'doge', and reams and reams of repeating text like "#FUCKGOOGLE". Actual advertiser spammers are soon going to catch onto this ability, so the messages offering free copies of popular video games like Minecraft no longer have to come with the polite request to copypaste them into your address bar - they can just be clicked. This is just the tip of the iceberg in the first few days. I know I'm not alone in wondering how long it will be before someone finds a way to exploit these new comments as a vector for directly delivering malware. And even if the hyperlinks are removed, it has created a enormous new canvas on which trolls, children and idiots can paint their own brand of humour. There does not currently seem to be any way of blanket blocking URLs, instead needing a filter list set up with every potential combination of keywords and domains.
The kind of people who create and post this stuff are the kind of people least likely to care about creating multiple throwaway accounts or having this rubbish leak into other websites. Anecdotally it seems that people who may care enough to try and contribute meaningfully are now more likely to abandon the comments section and Google+ out of frustration (just as this article concludes with). This could be turn out to be nothing but a win for the trolls, especially considering that removing the new features enabling them would be to render the system identical to the old one.
I don't like the channel myself but a _very_ popular personality called PewDiePie has now disabled comments on all his videos due to the change. Other channels seem to be following suit or considering it. If you would like to hear a very honest spiel about the frustration these changes provide, search for a channel called NerdCubed and look at his recent videos for a video on the comment section. The comments that could be found under your average YouTube video were already enough to drive a content creator to exasperation as is. Rather than helping, this has seemingly made things significantly worse.