I could not really find it in the suggestions here, but it would be awesome to have some kind of Affinity Suite sync.
This way if you favorite a font in Designer it could also be a favorite font in Publisher.
Same with color pallets you make. It makes sense if you are a Graphic Designer and you are designing a logo in Designer.
And then make a branding guide in Publisher to be able to have the same: assets, symbols,font favorites, pallets,...
You can do it now by exporting and importing them, however it could save a bunch of time if you could just have it in a click.