It would be helpful to show vote counts on the activity > comments page, and also allow sorting by votes.
This would make it easy to see what comments other people thought were valuable or at least amusing.
While a nice idea, the purposeful relegating of comments to second-class-citizen status means that extra support for them isn't likely to be forthcoming.
As a consolation prize, this information is available via the Data Explorer, e.g.: Top ranked comments for a particular UserId.
Though the Data Explorer often doesn't have the most timely information.