I first checked the date of this thread, thinking it was a necrothread from 2006 or so.

And of course it's all about score, and how adjustments at score would make everybody suddenly play in a "better" way (whatever that may be.
But after all those years of keeping a very close look on the actual scores (analysed over 800K individual scores so far), how players actually fly and realizing again and again that most people don't have an idea how score actually works (not only in theory, but also practically), I am utterly convinced that the huge majority of players don't really care about score. Else it would not be so easy to propel your rank up by several hundred by just doing just one or two additional "special sorties" per tour. Most people just look at their score and shrug.
Yes, many players want to survive, but that's an inherent desire not coupled to score/rank. In fact, most players could rank much higher in fighters by halving their K/D in exchange for like just 50% better k/h.
To me it sounds boring to have a 9kd if your kph is .0000013.
I know this was a kind of exaggeration, but players with stats like that don't really get a good rank at all.
It's easier to stay alive than to get a high K/h, so the latter category has already more impact on the resulting rank than the former.
Also, as stated my someone else before, it also depends a lot on when you fly (easy to spend half an hour in off hours without getting some shots at an enemy), and what your own mission profile is. When you enjoy flying escort for your bomber friends long distance raids, you also get a very low k/h from it.
By the way, monthly tour winners aren't even announced on the HTC webpage anymore. Apart from being able to control CV's, there's absolutely no practical incentive anymore to get a good rank. In fact, I do believe players do care less about score than ever before, because there's no way I would have been overall #1 after 2/3rd of a tour without having a single base capture in bombers and vehicles.