Let me start out by saying that I loved this visual novel.
The story was really well executed and I appreciated how the writers actually expanded on the universe and allowed the story to delve into it rather than just teasing us with it (I'm looking at you Comyu).
The characters are perhaps the strongest element, all of them are fleshed out with their own stories and personalities but what really makes the characters memorable is how nearly all of them re enjoyable, even the ones who start out as people you hate by the end you can sympathises with them such as the dominion members (excluding Ichina who was just the worst). Even Keijirou was introduced as a bit of a dick but quickly became awesome.
An interesting thing I found with Ayakashibito was how each route actually dealt with all of the major plot threads (dominions hunt, tens plans etc.). I assumed that this would be similar to Hishozora where plot threads are resolved as you go through each route with the final one bringing all the resolutions together so I was pleased to get something a little different to what I'm used to.
Favourite route would have to be Touko's with the second ending. I loved how the protagonist become possessed and delt with such dark thoughts and Prez's final farewell was just heartbreaking so much so that I actually felt bad for not being able to develop a bond with him in later routes.
My favourite moments would have to be Karito's moment of glory in Tonya's route (Karito was actually my favourite character as well so it was a pity they didn't do more with him) and Kuki's final moments in Suzu's first ending (I cried a little inside and I'm not sorry).
As far as criticisms go I really don't have much. It did take me a while to become invested into the story so it was something of a slow start for me, I'm not sure if anyone else had this problem.
Overall I loved Ayakashibito, great story, brilliant characters and an interesting world that I can be invested in.