I definitely would have sent the battleship to 110 to soak up plane hits instead of the subs. I disagree though that it was a bad choice to do the SZ110 + SZ111 attack: Booper had about a 7% chance of winning this match based on ELO differences so an audacious/game-changing turn 1 is often necessary to change the odds to something better than 7%.
Here is the odds for the net planes lost (10 German vs 5 Allied scramblers)
45% disasterous (-1 relative planes lost)
20% not good (0 to +1 plane outcome)
25% good (+2 to +3 plane outcome)
10% amazing (+4 to +5 plane outcome)
Sadly for Booper, he got -3 plane outcome which made this game a Loss on G1, but I think he would have had a reasonable chance of winning in the 35% of outcomes where he gains 2 or more planes in the exchange, and would have a net increase of his expected win rate on average.