I actually am a fan of SBR.
In my opinion, it would be a game opening strategy to use your bombers to raid. It is simply that when it will be time to go for the homerun, you will need your bombers dices.
You also have to consider that usuall, rich factions that would consider bombing first (USA,GER) usually don’t have a target on 1 turn sbr (except for London…).
This means you will start carpet bombing at least on turn 2.
I also am somehow convinced that you must not throw in too many bombers in such an operation…
when you have a whole lot of bombers you always seem too loose more thant if you had sent only 1-2…
but bombing a poor faction is the best way to set the way, going in for the kill.