I'm still working on this layout but haven't tackled the mobile version yet. I got sidetracked trying to make post replies look and work better. One thing that annoys me is that the engagement count for comments only shows the number of direct replies to the post instead of the total of all replies. So I've been thinking of at least adding a counter for how many total replies are downloaded/visible:

I think you only ever see that button with the full comment count if you enable "smart threading." My downloaded number is done entirely with CSS counters and only appears on a post that has at least one reply. It dynamically updates if you press the button to load more comments. I would prefer an option to just show the total reply count in every thread view mode, but it doesn't just hide that "16" it doesn't even create it in the other views. So the best I can do is a count of how many are currently downloaded and visible.