I don't think every form has to contain all elements.
If so, doing a form would be an all-day affair!
Information should be recorded in the forms.
Some, yes. All or even most, no. IMO, kata was
never meant to be an all-inclusive source but rather a common-usage dictionary and basic grammatical reference. An individual form can be seen as a chapter, the whole series of forms as an
abridged book. The question is then, what should be included in a style's forms?
1. The essence of the style - The stances, postures, doctrine of movement, attack and defense, biomechanics of power generation, method of execution and other foundational elements.
2. A tool "bag" of basic techniques executed within the concepts of #1. The whole tool "chest" is much too heavy for a single form (or even series of forms) to carry around.
3. A selection of self-defense
flexible scenarios one may commonly experience and how to handle them using combinations of the techniques in #2.
It is necessary to understand that forms/kata were not designed to the be sole source of info. They were designed to be used by those already familiar with the art in conjunction with partner drills, drills of basics, and
most importantly, with a teacher.
Anything not contained in the styles forms was supplied by the teacher such as additional strikes and blocks, tactical variations to specific scenarios, and everything else a teacher is supposed to do.
If something is not recorded in the forms, where should it be recorded?
It is recorded in the student's brain and body having been transmitted by the teacher thru oral teachings and physical examples. Any other method of recording is subject to later misinterpretation, to a degree determined by a student's prior knowledge and abstractness of concept.