What I do take is a Adventure Medical .3 kit with bigger compresses, added medications and better tape. CoFlex tape has become our favorite for wrapping wounds with a compress. It sticks to itself but not to your skin. Lueko tape is the other standard as mentioned. Scissors and pair of Uncle Bill's Sliver Gripper tweezers are my first aid tools.
Learning to improvise for splints and other first aid devices is a core part of backcountry first aid. Belts, straps, rope, bandanas, clothing, tree branches, tent and trekking poles all come into the mix. Having a core kit with sterile dressings, tape meds, antiseptic creams, blister, splinter and insect bite aids is important to me. If you are prone to knee or ankle problems, adding a Ace bandage is probably a good idea. As with all survival gear, you want to equip yourself with enough gear to improvise, as you will never know the exact situation.
I have a lot of first aid training and have used it a few times for broken arms collarbones and head wounds, as well as all the typical stuff like splinters, blisters, minor cuts, and insect bites. My wife is an RN and my father was an EMT and first aid instructor; with that and Boy Scouts, it's second nature for me to have an effective kit. I do cringe at calling a few bandaids and a chunk of moleskin a first kit-- that is a delusion!
BUT, apply the same principles to your first aid kit as you might to any UL gear: take small amounts appropriate to the trip or intended use, seek out the lightest, highest performance versions and look for multiple use opportunities. Knowledge is light, so make that first on your list :)