I thought Blackadder played really well last night, against more than decent opposition. But looking at his game - close to source, lots of involvements, tackling around the waist rather than up high - I'm always wondering whether his game isn't best suited to 7.
But then you have another issue, which is that he isn't particularly fast or dynamic around the ruck. Now Sam Cane was pretty similar, especially in his later years, but we also saw that he was actively targeted in this sense last season, with attackers running strike moves to isolate and pass him by. So it would probably be the same for Blackadder.
To me, there's growing clarity around the loose forward roles in Super Rugby and this, I think, should translate to AB selection. You have opensides who are very mobile, excel at the breakdown and who have an active but loose role on attack as a carry and link player (Savea, Kirifi, Lasaqa). Then you have number 8s who are high-volume carriers and are able to physically impose their carry game through the middle of the field (Sititi, Lakai, Sotutu and Lio-Willie).
That just leaves blindside, which is probably still the most varied position amongst the NZ SR sides. Players like Finau, Parker, Flanders, Shields, Iose, Choat, Segner, Howden, Withy, Grace, and Blackadder have all played there, which is a mix of mostly opensides and number 8s.
I think the AB selection this year should really try to cement their vision on what they want from a blindside, with openside and number 8 becoming relatively straightforward, in my view. It’s a chance to bed in the loose forward-selection for the next few seasons, at least, which should really help the team.