Took a long (hour+) mission in bombers last night. Blew up 4 buildings at a AAA factory and flattened 4 FHs at a31. Got 1.6 perks for it (wtf?!?! Explain that to me!), but I took 50% fuel and still had 25% by the time I landed over an hour later.
Historically bombers had to trade fuel and bombs for distance and performance. You want more bombs you can't fly as far. You want to fly higher you can't carry as much bombs, etc. Now you can fully load up a bomber and say "screw the fuel!" and still fly around full throttle for hours on end.
I think 2x fuel burn is a good thing -- for fighters
However I think we need a higher fuel burn for bombers. On the hour+ mission I mentioned in the previous paragraph, I flew a route that covered about 8-10 sectors (well more than half the fricken map) at full throttle and never ran NEAR to draining my tanks. This is at 2x fuel burn. I think all bomber craft (Ju88, Boston III, A20 (yes, A20, it's a boston with a hard nose, and carries 2x the ord), b17, b24, lancaster III, Ki67, and b26) should all have a second fuel burn rate, which would be set to 3x or 4x. Yes, I said 4x.
The Ar234 is too short-legged to get to altitude as it is, so I can't justify crippling it further.
Then leave fighters the same but burn bomber fuel faster, that way they have to choose gas properly, they have to choose light loads vs overly heavy loads, or high alt safety vs low alt duration.