Scott and Bird aren't that small... well perhaps small compared to some of the giant backrowers going around but both would be in the top 10 backrowers when it comes to strength.
I would personally love a Hoffman type player in our squad. Someone who just runs lines and does it all day everyday.
If our backrow looks something like:
11. Bird
12. Scott
13. Kidley/House/Mckinnon
There aren't any hole runners.
Bird is amazing in his own way and will create 2nd phrase play and make plenty of metres.
Scott won't let any tries down his side. He does run holes but doesn't have that much impact.
Kidley will just be like Dallas Johnson or David Stagg and just cover gaps in our defence.
House is similar to Kidley while McKinnon I guess could run into gaps...