A small design nitpick: the style for the subtitle of the new recent changes page is different from the old style and the style in the mainspace. Take a look at the screenshots below to see the problem. The style of the text should probably be aligned between the old and new versions.
Current design for watchlist:
New design for watchlist, with "New filters for edit review" beta feature enabled, where the space between the horizontal line is smaller, the font is larger, and the font colour is different:
Current design for mainspace pages, which inconsistent from both of the above (for teh lulz) :
That impacts the display of watchlist-summary between interfaces using the filters and the ones not using them, as reported on English Wikipedia.