I agree with Vermillion on this one. The Lanc just doesn't have the speed, ceiling, or firepower of the B17, and it will be torn apart in the MA. I'm glad they're coming, but with a ceiling of only 24K, EVERYONE is a gonna get a Lanc.
In the long range scheme of things (strategic bombing? scenarios?) it may be just the thing, however I doubt we'll see many ofthem after the first week of operations...
Now the B26 might be a different story...