To summarize, this change makes things worse, not better. Please do not promote it.

@Novem_Linguae; Yes, I know it is trivial to add sorting to a tabular display. But note that I said "I would gladly give it up if it keeps other features from being implemented" Specifically, my idea of having hierarchical drill-down makes such simple sorting impossible. Since sorting adds such little value compared to the great value of a collapsible hierarchy, ditch the table. In the process, you make the list more compact, resolving one of @JAnD's concerns.

Not sure if this is the right place to leave feedback; if it is, it isn’t obvious; the "Add Actions" drop-down seems particularly confusing. I expected to see an "Add Comment" option but found done. Anyway, if this is not the place for my comments, please move them to the right place.

A note here, the icon depicted here - whether open or closed - does NOT represent a beaker. See https://en.wikipedia.org/wiki/Beaker_(glassware).
The icon is depicting an Erlenmeyer flask. See https://en.wikipedia.org/wiki/Erlenmeyer_flask.
This distinction is clearly visible at https://commons.wikimedia.org/wiki/File:More_simple_chemistry_apparatus.gif, where the Erlenmeyer flask is referred to as a conical flask.

This font diversity is obnoxious and makes these change lists look really unprofessional, as though WP had adopted the ransom note school of typography.

You are most welcome, @Jdlrobson. Thank YOU for fixing this!

Here's links to check in on enwiki:
https://en.m.wikipedia.org/w/index.php?title=Wikipedia:Sandbox&oldid=777348158 mobile view - currently laid out incorrectly
https://en.m.wikipedia.org/w/index.php?title=Wikipedia:Sandbox&oldid=777348158 desktop view - laid out correctly as it has always been

It is now fixed on test2.wikipedia.org. Thank you very much!!!!