Ebuild does not contain snapscan_firmware function which is called in pkg_postinst(). Firmware plugins does not install at all.
It seems as a great clean up of iscan-2.11.0.ebuild.
I removed the function alltogether - firmware (binary plugins) will be installed via different ebuilds (like iscan-plugin-gt-f720 that I just commited).
If there are some missing plugins that were present in the previous version feel free to open a bug (and better yet, submit the ebuild :)
pkg_postinst() is cleaned up - it is good. Thank you.