Bomber perks are worth nothing anyway unless you just love flying a B29 at 30k.
If bomber perks don't matter, why asking for more of them?

This is a game of combat. There should be incentives to wage combat over avoiding combat. Before the perk cap, players were actually waiting for someone to drop the strats or towns instead of engaging them. I made plenty of sorties to the strats to bomb defend and resupply them and had always film running. Near the end of that high-perk period, the very moment the strats went down big time you could see numerous goons upping for resupply runs. Obviously those pilots chose to harvest the strats instead of fighting the attackers. The ratio of suppliers vs fighterswas very 'unhealthy'. Interestingly, with exception of HQ there was little complaints about "it only restores 4 minutes", because that meant you could harvest perks for extended times. A 50% factory would have given you about 10 perks, I did several runs which netted me more than 20 - for just 6-8 minutes of flight time.
Non combat activities have to be less attractive for the player of average skill and above, because this game lives from combat. And even with the current setting, resupplying the strats is still a great perk generator. If you fly to the strats and ditch, you get 3 perks for a flight. That's 23-30 perks an hour for a totally safe, non-interacting mission. Getting that many perks in one hour in regular bomber sorties, one would need plenty of luck and skill.
And let's not forget that the current setup has brought back a purpose for the bombers beyond simple short range tactical support missions "flatten the base" and finally given the B-29 a purpose.
The focus should be on attack and defense, not waiting for something to go down to fly transports on the deck.