Just my two cents on this whole subject speaking from years of RB3D experience of the same issues.
FM/DM issues are, and always will be, subject to debate for all eternity. Mainly for 1 important aspect. Human interaction.
Keep in mind something, we fly this game 1000's more times than a real WWI pilot ever had the chance to. We practice 1000's more times than what is realistic. We can attempt all kinds of different tactics that work, and fail, and test them to perfection. They couldn't. It was a one-shot deal. You make a mistake, you die. If your training did not include counter-action, you died... etc.. etc. Instinct killed you as well.
So what does that mean? It means that no matter how we tweak the FM/DM it will never fit what we expect, because we are all infact, aces. We know what they are going to do, before they do it. We have favorite planes that we know how to fly really well for YEARS... they had months, sometimes only weeks with a far less time in each plane than we get.
So if we weaken the DM, the kills will mount like crazy. If we tighten the FM, we'll be flying like the Blue Angels. This is a subject that for even this day, on many RB3D mods that are OVER 10 years old now, is still debated and tweaks are still offered.
It's a road that I hope is a short one for OFF, because honestly, it will never be solved they way anyone expects, myself included. Trust me on this. We have to compromise on the FM/DM. The only way to get an accurate DM is to create hit boxes for EVERY piece of the plane. And that simply won't happen. What we have is major boxes that accumulate points until failure is reached, like most Flight Combat games.
Personally, I'd like to see more visual damage on the planes, wings failing, etc... but not a kill on my first burst. I agree that it's taking too many bullets to bring down a kill, but at the same time, I don't want to rack-up 10 kills a mission either, which is what I was doing in RB3D.
I like the balance we have now, it's hard work to get a kill. Like I said, we've been doing this for years now, of course we're all good flyers. So we need an FM/DM that challenges us, not feeds our hunger.
Make sense?
All the best,
OvS