There are three different general ways to attack this problem, if problem it is (and an unspoken fourth that I'll get to in a minute).
The first (and most expensive) is to buy lighter gear. It looks like you've got a good handle on your preferred level of comfort in camp versus comfort on trail. Note that a lot of gear choices are very individual (shoes, hammock, quilt temperature ratings, pack, etc.) due to your body being different from everyone else's. It's worth trying stuff out for fit before purchase, if at all possible.
The second is to leave stuff at home. I recommend the three-pile method here: after each trip, make a pile of stuff you used all/most of the time, a pile of stuff you only used some of the time, and a pile of stuff you didn't use at all (never include your first aid or emergency kit in this last pile). When you go out on the next trip, leave the third pile at home and think really hard about whether you need the stuff in the second pile before taking it.
The third (and probably best) is to work on yourself. A good cardio regimen (including some light to moderate weight training) and good diet is a killer on the trail. I know I feel better now than I did a year ago; my running and weight lifting has been immensely helpful on strenuous trails.
Finally, the fourth (and usually unspoken) option is to do shorter trips. I know most folks don't like to talk about it, but it may be worth cutting your mileage down to something your body can handle. I've had to reexamine my trips based upon personal fitness and loadout before. Be honest with yourself, and the rest will follow.
Of course, the ability to recuperate in an hammock overnight is definitely worth the extra ounces for me. I feel much better in the morning getting out of an hammock than I do getting up off of the ground. That's a compromise that's worth it for me (and, considering the title of the forums, I'd hope for the majority of the folks reading this as well ). Find the level of comfort you need in camp and examine it versus the amount of comfort you need on trail. That balance is the key to a good trip.
Hope it helps!