He obviously didn't want to upset Croft and Cuthbert by dropping them straight out of 23 from starting 15. Neither make sense on the bench. Cuthbert out and out wing and Croft a light second row option. Bowe as good a player as he is has done nothing form wise since he came back from injury, I'd say Cuthberts nose is well out of joint.
Loose head is a real worry. Marcus Horan never went on a Lions tour, it just goes to show that sometimes being a Lion is down to pure luck and scarcity of quality in different generations.