I think of this one as being similar to Big Week.
The bombers in this one have lower defensive firepower and are, perhaps, less robust than in Big Week.
However, the German defenders have, I think, less bomber-killing power here than in Big Week because in Big Week, 40% of the aircraft were 190A's, and the 109's could all carry gondolas. It depends a little on how accurate folks are with 30 mm here. Those can be nice, but for a lot of people, the bad ballistics and low fire rate means they aren't as deadly as 3-4 20 mm cannons.
Big Week worked out OK.
This one is like that, but has the ratios tweaked a bit in favor of the Lancasters.
However, if a lot of folks think Lancs are still going to get wiped out most of the time, the next step would be increasing the number of allied fighters some -- by two (if folks think that's enough), or four (if they think the current setup really is not balanced well).
I think the current numbers are OK as long as Lancs are at least as sturdy as Ju 88's.