Ketogenic diets are usually too high in protein content measured over the overall caloric intake. Some people here have probably heard about the E.P.I.C. study, as in "European Prospective Investigation into Cancer and Nutrition"; it's one of the biggest epidemiological studies of our time. One of the most amazing findings of the study is that the prevalent obesity of the western society is highly associated to the excessive intake of proteins (not carbohydrates, not fats, proteins!), where "excessive" means above 15% of the overall caloric intake or so.
This seems to be a complete paradox considering the high efficacy of ketogenic diets, but remember that the EPIC study followed a statistically significant sample of several hundred thousand people over the course of almost 15 years, which is much more than the duration of a typical ketogenic diet, and the explanation for this apparent paradox is that ketogenic diets work through what is substantially a form of poisoning that drastically reduces appetite. But this doesn't seem to work in the long run (i.e. most people fail in going off the diet without gaining back part or all of the original weight).
As far as I know, a reasonable share of proteins over the caloric intake is about 12-13%, which is impossible to achieve on a ketogenic diet because animal foods usually provide way more than that.
Reducing appetite by filling the bowels with fiber instead of calories is certainly better than reducing it through toxic keto bodies.
Even though ketogenic diets are highly effective in the short term, why not adopt a diet that's healthier, more successful in the long run, and most importantly recommended by virtually every doctor?