Default Content Library only contains a few images, all in png (i would prefer .svg) :

When doing a story, we have those ones (but called "shapes", there in .svg :
C:\Users\{User}\AppData\Local\Programs\Qlik\Sense\Client\img\storytelling\shapes

What I propose is a default content library
-divided into parts : shapes (svg), image (matricial image, .. etc) and with subfolders or a least a way to search in shapes/images (ex : I work on logistic, I want to have in a few seconds all content related to logistic)
-with more shapes. Microsoft Office is full of it right now, and it's great.
-available in sheet AND data story telling... and even in shapes for scattered plot
-we also should easily change the color of the shapes.
Best regards,
Simon
PS : for reference, on my Powerpoint :

Bi Consultant (Dataviz & Dataprep) @ Business & Decision