I would love to see:
1. A user-selectable panorama 'projection' option (like perspective, cylindrical, spherical, orthographic, etc.).
Affinity's stitched panorama does a really good job but doesn't always choose the best projection type. When objects with many straight lines (like buildings) are in a scene a perspective projection works best as straight lines remain straight. A wide angular span mountain shot usually benefits from a cylindrical projection. The Microsoft freeware Image Composite Editor (MS ICE) does a great job of allowing the user to quickly click between different projections (after the images have been stitched) and pick the best one.
2. Allowing the user to specify the camera's orientation (pan, tilt, roll) of the panorama
Again, MS ICE let's the user easily do this (mouse drag left-right for panning, mouse drag up-down for tilt, mouse drag image corner for roll). This allows, for example, choosing the center of a 360 panorama by just dragging the mouse left-right.
Below is a shot of MS ICE's option
I love Affinity photo and it has many more options than MS ICE but is really missing these two EXTREMELY useful panorama features that are freely available from MS ICE.
Thanks.