I don't think it's a problem, FD.
I've noticed that it's now a little risky to fly medium bombers such as B-26s with only 25% fuel. So, the medium bombers do have a bit o' weight problem if they carry 50% fuel.
The B-17s and Lancasters still fly very long with 25%, but most planes reach over 20k around 6~7 minutes. And then you can almost double your flight time by cruisng at that altitude with most planes. Almost triple the flight time if DTs are on.
The burn rate does present a problem that you cannot directly chase after a buff formation passing over, and get into a long, climbing chase and then engage it.
However, come to think of it, that should mean that an interceptor must be prepared to deal with a threat at least 6~7 minutes before it reaches its target destination - it simply means people have to learn to plan ahead, and I can accept that as new game play.
....
If there is something that should be looked upon - it's the low-level deck bombing. Buffs coming in at low altitudes, crapping it's load 1000ft AGL, and then getting shot down. It's deliberate suicide.
While the fuel porking is now a non-issue, unfortunately, the new realistic field layout has lined the FHs and BHs up nicely, and a couple of suicidal formations can knock stuff out real fast.