The idea behind the "Get in touch" link was to expose a point of contact for the users of the given Pontoon instance. That's why it can be changed as part of the homepage editing.
On pontoon.mozilla.org we get very little emails through this link (which is a data point on its own), and they are mostly (if not only!) about external installs. That's not shocking news given that a) our users already have established points of contact and b) other links in the footer aren't instance-specific.
Let's replace the link with the "Give Feedback" link to Discourse. That will also add to consistency with the profile menu, where the same link also lives next to the "Hack it on GitHub" link.