Thanks so much for this great product.
Have you considered using sudo perhaps masquerading as su? That may negate the need for the intent calls to the Java subsystem.
App developers wanting to be better certified could probably use the feature to call specific binaries only ( perhaps a selfcheck.xml config file in the apk/remote authority/dynamically generated )?
This may perhaps even be used to signature check other apps/binaries and inodes/processes/boot sectors/system partitions/dex files etc.
Since your app is already so popular, it could probably become a certification authority or the like
Thanks once again and do keep up the excellent work.