There has been a lot of chatter regarding using reporting services like SEMRush and Moz which will give you site audits. Usually, these reports give back information such as errors and issues One of the major errors I've seen reported on a lot of HubSpot sites are the Duplication errors for things such as:
The first bullet, as mentioned, can be fixed with using URL mapping tool and HubL, the last two, however, we have zero control over. I know we can use JS to change the titles and meta's for the listing and Google's searching should be ok with checking those differences on the page. This can be tedious to do and a much better way would be to allow us to have a "Page Title Builder" in the SEO & Crawlers Tab. This can let us fi page titles and have them render server side rather than relying on JS to fix things and hoping they will be picked up during the next Google crawl.
I have created a mockup below for this (based on Yoast's SEO WP Plugin) to better explain a possible solution:
Also, I think it would be awesome to have Description fields added to the blog topic's so we can create custom Meta Descriptions based on those topics and not have to rely on just the default blog meta description or one that Google pulls automatically (which is usually the post excerpt of the most recent post for that page).