[Nyororin]

I can`t see how this would be useful for anything other than writing... And even then, a pretty convoluted way to improve.

Most kanji are so far removed from the meaning implied by the radicals - if they haven`t been simplified and are now no longer using the original radicals at all - that it won`t be of much help with meaning. Occasionally, a radical can proivide a hint about the reading of the kanji, but again, it`s hit and miss as there are more that don`t take a hint from the radicals. With writing, I admit it will probably be a bit easier to write properly if you are familiar with the stroke order of the radicals (and later helpful with reading messy handwriting), but I don`t think it will really help you learn the kanji to begin with.