I've started to go over CSSU Hildon to see about GTK3 conversion. I've set up a new repo as a fork of the CSSU version. I'm now going over all of the file diffs compared to my version. Some will cleanly apply, some won't so I'm going through 1 file at time making the easy changes so I can just come back later to fix the rest. As a heads up, the Debian/rules from CSSU will not get to running configure in its current state under Stretch.
Is it worth removing the deprecated features listed in doc/migration.sgml where guidance is provided on how to replace functionality. I'm currently going over hildon-controlbar. Its a mess of gtk_adjustment_get/set_*() calls because of GSEAL'ed widget>adjustment. If there is a documented, simple replacement for the items detailed in that document, would you be happy if I ditch them?