@pja Hi, if I had Editorial I'd like to help you, but also if I had it, I would find some difficulties in answering you for one main reason over all: you have wrote about some problems you have with Editorial (but it could be any kind of software) without any complete runnable script or workflow or example that any user can execute/use, with a single/easy action, with his own device.
Without it (believe me, it is also my experience), very rarely someone gets bothered to write full working examples on his device that replicate your problems due to, mostly, the lack of time or interest from people in answering you.
So, post here some links of your scripts with full executable codes about footnotes, in-line images, etc.. and maybe you would be more lucky.
You (I, others, ...) have to do the main part of the work, even if the software is a paid software, believe me.
Bye
Matteo