We don't have claws because we evolved from frugivores (Australopithecus). Each successive evolution of primitive man included more and more animal protein in its diet. This was achieved by scavenging the kills of top predators in the African savannah. For that, claws are not needed, just the ability to be quick.
Our sweat glands are different from those of herbaceous (hoofed) animals. We have what's called eccrine sweat glands, which are unique to primates and are most developed in humans. This form of cooling has evolved along with our bipedalism and hairless skin.
Hoofed animals have apocrine sweat glands which utilize a different form of secretion. Humans have these glands too, but only in the armpit and groin regions. They don't serve as a cooling mechanism for us in the way that eccrine glands do.
Actually our front teeth are pretty sharp. Carnivores have teeth designed to grab and hold onto prey, hence their large canines. But we never needed those in the first place. We have these amazing things called "opposing thumbs" that can grab, pull and lift. If you compare the jaws structure and teeth of our predecessors, they started out to be very large and flat, with heavily muscled jaws designed primarily for plant consumption. The teeth of a vegetarian. Our teeth and jaws became smaller over time because meat is so much easier to masticate than vegetation. A. boisei (now re-classified as Paranthropuus boisei) was 100% vegetarian, but he was also an evolutionary dead-end. When a species develops a specialized diet, it becomes vulnerable to extinction. If there were severe droughts and wild fires, omnivorous animals such as early man had an advantage or his vegetarian cousins. They couldn't go far from the trees and grasslands, whereas we could range far as long as there was protein of some kind.
Pertaining to the digestive tract, I'll embed a link that discusses it in greater detail.Overview of Digestive Systems of Primates/Humans
Where the strength of our gastric acid is concerned, I'd like to know where they get their information from. I can't find any data relating to the specific parts per million of HCI, potassium chloride and sodium chloride of HCI found in carnivores. I think they're full of shit. We have zero problems breaking down meat, if we did people would probably be dropping like flies.
They also must have forgotten to mention that human salivary glands also secrete salivary lipase (a more potent form of lipase) to start fat digestion. We have slightly alkalized saliva, average pH is 7.4. The average saliva of ruminants is significantly more alkaline at 8.5--they need that alkalizing buffer so the bacteria in their rumens isn't killed off by acidic spit. But we don't have rumens or multiple stomachs that are needed to most efficiently break down plant matter, now do we? Cats and dogs (one an obligate carnivore and the other a predominantly carnivorous omnivore) have an average salivary pH of 7.5 (cats) and a range of 7.34-7.80 (dogs). What does that tell you? Our saliva is actually MORE acidic than a carnivore's!
Sorry, forgot some references: