App notifications are hard to read
The current app notifications are hard to read in the light gtk theme and even harder to read in the dark gtk theme (at least for me, in terms of I can not properly read text + the whole notification is hard to spot IMHO):
Also I am not sure if the styling of an OSD (on screen display) like the gnome shell volume OSD popup really matches those interactive notifications? IMHO the styling of the shell notifications, which are also interactive and fit to dialogues, fit much better: