Out of curiosity: Does this squashfs feature will work somehow like a switch firmware in the future, having 2 "base images" and booting the newest one or the backup if the user wants to change it? Example:
SWDEP_02# show bootvar
Image Filename Version Date Status
----- --------- --------- --------------------- -----------
1 image-1 2.0.0.66 09-Mar-2017 13:23:09 Active*
2 image-2 2.0.0.42 01-Sep-2010 15:26:19 Not active
"*" designates that the image was selected for the next boot