I was not too happy about the single-post-view of the blog template. When I tried to change it, I realised that it might be easier to find a new template instead.
This one looks nice. The only changes I made were the post thumbnails and the display of full posts on the front page. So far, I am happy with the result. There might be some bugs to be fixed or other small changes, but it looks promising.
Changing the Hugo template was easy enough.