Could you please do something like bold the task name in the task list when a new comment is added, so we know that there is a new comment to read? Or add an icon next to the task name? It would be really handy so we can know when a reply has come in, when working in the project view.
OneNote has this feature – when a new page is added that the user who is logged in didn’t create, the title is bolded. It’s a very handy way of checking new additions.