Lacking a teacher who can teach the kata beyond the pattern of the kata it does become necessary to try and figure it out.
I found an interesting piece on kata analysis from the Shukokai website which has since moved, to where I don't know. Lucky for me I saved the page.
Some key points I gleaned from this text are:
- It is futile to do with more what can be done with fewer.
- Ask a class of beginners to list the techniques they consider most likely to be faced with should they be assaulted, and they will compile a list for you that is similar to "push, grab, headbutt, headlock, football kick, right hook, downward strike (bottle)".
- Yet when analysing kata for effective applications, many karate-ka resort to the techniques they have learned to perform as the attacks that they must defend against. This makes sense, if one were practicing for the competition fighting area, but if we consider that our civil defence tradition is designed to protect us against these "habitual acts of violence", then these are the attacks against which we should be looking to defend.
There is much more in the original text but these pretty much summarize the bulk of it.
And it is fun to try things and see what works, what is practical and what would make sense.

Mick