Hit % and points increase greatly when attacking bombers. Thats why so many 262 and Temp sticks have a lot of points with not that many kills, but yes, killkng bombers are important for helping to achieve a higher rank all around, espcially if you can kill them quickly and land.
I don't believe many players are utilizing re-arm as much as some might perceive. Re-arming also takes quite a bit of time to fly back to the field, re-arm and take off, so it may negatively impact your K/H, also, if you only have 2 kills, re-arm, and then say get only 2 more, you are going to take a big hit to K/H and its not going to impact your overall score that much. You are much much better off getting 4-6 kills in one sortie and landing, than re-arming and only getting 3-5 kills. These days, I hardly ever see players get more than 8 kills in a plane, and I can bet you they arent re-arming in that sortie.
I agree that HTC probably won't code any changes to points or anything, these are just things i understand about scoring over the years that would be nice to change, but knowing it won't happen.