I was pretty excited to see this new feature so I gave it a spin. I had recently shot an undercarriage of a Corvette with about 7 individual shots. Rather wide focal length and a focus distance of about 4.5 feet. A friend with Photoshop CC could not get it to stitch and had to resort to manual merging. I tried PhotoStitcher (for Mac) and it barfed. Their tech support people asked for the files but could not do it. But Affinity Photo 1.4 did so in about half a minute. :) And it turned out very well! Thanks guys!
Been playing with 1.4 and it is nice , especially that dehaze capability (amongst many others). Still not too sure with the RAW processing module though - Adobe Camera Raw (LR and PS) is much slicker, but that might be down to familiarity - not sure.
That said, Affinity Photo is superb given it is still early days yet. The price is amazing and it must be seen as a viable alternative to PS now.