I would like to suggest that if guests cancel it should show up on their review page same as it does on the hosts page. Even if a host cancels a year in advance it is there, a huge negative, most people do not bother to look further than "Cancelled". Guest and host should have right of response to clarify why in the spirit of transparency promoted by Airbnb.
But, however it's done, in this spirit of promoting honesty and trust that Airbnb states it holds in high esteem, it should be on the guests page, epecially given that even Strict refund has been halved and the host only gets 50% instead of 100%. Many of us are not hotels, we are sharing our apartment. Knowing someone has a history of cancelling just before check-in would be valued information, given that cancellations especially at peak times are a severe dent to our business, not to mention that the host has no doubt prepared for the guests stay and incurred costs and also limited their schedule to be available to host the guest.