If the fuel burn rate is lowered to 1x, then perk prices should go up accordingly (with the best performer being taxed more than early war birds(a bit like the tax differential between riches and poor)). Spit16s, La7s, Ta152, P51s, etc will enter the perked range and 262 will cost 25 to 50% more while Hurri MkI will stay at 40 ENY.
Personally, I'm not against trying this out for a week or two and get a feel for it. But we have to think if this will increase gameplay satisfaction of long time players and guarantee an increase in future players. However, I think HTC has bigger cats to take care of right now and only a well written and complete list of suggested changes to fuel burn, projected infulence on gameplay, perk prices for EVERY planes in the game, maps, etc should be handed over for review by some good Samaritan.