The report doesn't state what taxiway the DHC8 came from, or how much distance was available for the C172 to land on.
But there are some dangers involved in a go-around, like performance with a full flap setting, and a full load (not sure about the C172 though, but I've tried it in an elderly C172 with low HP, damn hard to gain speed and altitude at the same time, you need the altitude to clear obstacles, and the speed to retract the flaps)
Not considering my experience, but if the pilot deemed it safest to land, he was in his right to do so.
But as said earlier, wait for the report.
I'm a little puzzled that a go-around wouldn't have generated a report though? We usually see a go-around due traffic on the runway as an "evasive manouver", and therefore a incidentreport has to be filed.
This made me laugh:
"A report will be released within several months."