you really think you'll be seeing any enemy cons over a base with a furball that high up??? no i doubt there will be many there. and seeing as how very few cons will intercept co alt, the mossi has no real threat if flown properly at all... and how many times have you seen any cons on your six with the 234 if you fly that right also?
I have flown the 234 many times in the past- mainly when winging up with Spikes. When I fly the 234, I deliberately put enemies on my six so I can shoot 'em. I rarely, if ever, use them for bombing.
It's not really a question of whether someone wants to intercept a Mossie. It's whether it will unbalance the game. That is what the perk system is for- game balance.