For clarification: "butterfly sutures" and "steri-strips" are nearly synonymous, so yes we're essentially talking about the same thing. The only difference is that the steri-strips are straight whereas the butterfly sutures have wings where they stick to the skin but are narrower over the wound. You can easily leave gaps to allow the wound to drain when placing steri-strips, but for laymen who don't think of that the butterfly sutures have the gaps sort of built-in as it were.
Combat Gauze, yes the military uses that extensively, but we may just have miscommunicated because it is NEVER referred to as "Quik Clot" in the circles in which I work. It is called "Combat Gauze." When you say "Quik Clot (nothing follows)" believe me 99% of military docs will think of the exothermic powder. I didn't even know the same company makes it- the medics carry it and I only remove the stuff when the patient gets to me, and I guess that on the few occasions that I even saw the packaging I didn't pay enough attention. But a quick google search reveals a whole line of Quik Clot products all based upon the Navy research into kaolin-infused gauze (which was carried out because the "old" Quik Clot sucked so much).
OTOH I'm certain that the "old" Quik Clot is off the market, so maybe I should have picked up that you didn't mean that stuff.
Anyway, I have no objections to Combat Gauze. It is certainly pretty light for the capability that it provides, and I can certainly understand the appeal of such a 'magic' hemostatic agent to most people. I had never heard of stuffing it in a nosebleed but the new stuff isn't nearly as exothermic as the old stuff so I see no reason that it wouldn't be safe.
Risk = probability x consequences
For instance (if I may indulge in a reductio) a meteorite strike to your person would have devastating consequences but the probability is so low that the risk is essentially zero, and it is not worth hiking in a full-body kevlar and ceramic suit.
Conversely, re: mountain biking, I imagine that minor injuries are more common than when hiking. I also imagine that most of them are larger-area but shallow abrasions often containing debris. If I were mountain biking I think I'd carry more dressing supplies and a real forcep for removing debris, and possibly a real irrigation device. Heck, I might even carry a SAM splint- they are relatively light.
Mylar blanket? Will you ever not have some sort of better insulation with you, like a down bag? Well, I guess on a day hike... It might be nice in wet conditions where you can't dry the victim off very well, to protect the down in the bag. And I guess that it would add some benefit but is it enough benefit to carry the bulky thing around? ("Bulky" here is a relative term, clearly. I can pack a lot of Motrin in the same volume and get better use out of it, is all I'm saying.)
Regarding my expertise/experience: remember that I'm a SURGEON, not an emergency-medicine doc, and when you're a hammer every problem starts to look like a nail. (Though I did recently join WMS and am trying to learn a bit on the subject.) So I'm pretty facile with traumatic wounds but on most other subjects I'm weak. You don't want me managing your status asthmaticus, for instance. :)
There is an ER doc floating around here somewhere, though, IIRC...