I would like to inform you that these features missing in Affinity Publisher are a big problem for me. I started editing 18 printed books in which the cross-reference function would be of great help. There are up to 100 such references per book. Some of them are references that refer to previous volumes. So there is an example of the sentence in Vol 7 "... as I mentioned in Vol 2, Lesson 5.2, page 42, ..." This example therefore requires a reference between two different afpub files. In my opinion, this should be possible. Such a reference has been possible for years in Excel, for example. These 18 books are also published as e-books. At the moment I am still creating all e-books "by hand". That means I create xhtml, opf and ncx files manually in a text editor. Also with an index (of about 10 pages in the printed version).
Example of this printed version (created on Affinity Publisher): https://www.amazon.fr/Cerveau-son-fonctionnement-Psychosyntérèse-U-M/dp/1695360907/ref=sr_1_1?__mk_fr_FR=ÅMÅŽÕÑ&dchild=1&keywords=Le+Cerveau+et+son+fonctionnement+I&qid=1595160754&quartzVehicle=77-946&replacementKeywords=le+cerveau+et+son+fonctionnement&sr=8-1
I also have the general impression that the current version of Affinity Publisher is not suitable for long technical documents. Of the 18 books mentioned above, which represent a course in psychology and neurology, each volume has about 120 pages. If someone wants to write a technical book with several hundred pages, which contains a lot of diagrams and figures, as well as a detailed index, I have the impression that AP is too slow.
I understand that you don't want to talk publicly about your plans. But I can't wait very long because I have to edit the books mentioned. What do you think I should do? Test Adobe FramMaker?