Here's the feedback from @decidim/product on https://decidim-redesign.populate.tools/last_activities

Pending tasks

• The layout of the comment activity is confusing because there are two links in a row: the link to the resource and the link to the comment. And we want to keep all the links.
  

An option would be to link the comment to its immediate parent and omit the space. So there are always only two links.
In fact, it now works like this:

So, with the redesign would look like this:

• Participant avatars need more information. According to offline conversation, the agreement is to implement a minicard (pending design and layout), which is displayed when hovering over any avatar.