Automating this stuff is hell, because of the feedback being reliant on a very long stretch of the track to be played back. And shortcuts only give you false results. So the real time hw way (and fx printing) is often faster and better in many ways. I often record multiple takes of the echo and then comp it like vocals, or even use multiple takes at once panned whatever way works for the track 🤣.
Sending such a big desk to be serviced is a nightmare on so many levels.
BTW I like how much one can do on a small ssl mixer with no eqs.