Limit depth with pagelist_ext shortcode?

Hi thanks so much for this incredibly useful tool,

Wondering if its somehow possible to limit the depth of child pages listed while also displaying the feature image and excerpt?

I mean
[pagelist depth=”1″]
works to limit display to just top-level pages, but
[pagelist_ext depth=”1″]
Doesn’t seem to work

Any tips? I guess I might need to write my own query?