I recently checked out the sketches and QA site for 4.0 and noticed that the information density on the course page has suffered drastically. It already got lowered with the introduction of the completion status badge but now it feels even worse.
Previously it was no problem and very legible to have a section with a dozen submissions, file downloads etc. or a mix of them in a fraction of the available screen estate.
With the design in 4.0 much of the vertical screen space is now wasted. I am not talking about the width which is fine in most circumstances but why are video activities so large that only 5 of them fit on a single page? Other activities are similar especially if they have open or due dates.
It is common to have sections/topics with more than 10 activities and with the new layout these do not fit on one screen anymore. Having to scroll drastically hinders readability and makes scanning the content very hard. One does not need the type of the activity spelled out next to the overly large icon in the same size as the activities title. Also putting every activity inside a box with 1.5em seems very excessive.
Information density should not be reduced this much. Whitespace might be used to separate different topics/sections which these are clearly not. Furthermore these are only screenshots from my desktop—on mobile the experience is even worse.