If I may add to the above 2 items which are pretty fundamental...
1. To have a cataloging feature...so that editing photos taken can be much easier, to first cull the photos, rate, etc then move to develop, edit, export...
i am trying out the trial version and just tried to do it with my shooting session...it is a pain to manage....have to switch back and forth to move files to folders that will keep for develop, etc...not a natural workflow and a waste of storage and time consuming.
if Affinity photo can speed up the performance, reduces the file size and have a cataloging feature, it will be a winner, those very specific and more nitty gritty features are niche, and nice to have. think of the larger community...feature sets are pretty rich already, from layers, stacking, Color channels, markings, selection tools....but with slow speed, large files that take much undue time to backup edits and lack of cataloging features just make it few notches behind....without these few fundamentals will not be adopted as full fledge system like adobe and captureone etc....I believe affinity photo has the features and functions covers (90%) but seriously lack what I mentioned.