I'm not sure if much Indesign-users are aware, that when placing a PSD or an AI, you can disable/hide layers (I use it mostly for white coloured logos with transparency).
So with my many documents I hope to bring over to affinity, I have the issue, that these disabled backgrounds creep back in my .afpub file.
This requires some extra-steps to either open it in AI and deleting the background and saving it, or convert the .ai to .afdesign (basically I'd be fine with that in the long run) but an option to choose the visible layers "on import" is still missing. (like you select the page of a multipage-ai)
This is not to be reduced to a sole feature-request – I would say it is required to successfully convert an IDML to AFPub.