Don't mean to be going in a circle here, just about some of your points:
- I agree that repetitiveness isn't either bad (necessarily - it's better if it's part of a prescribed form rather than just 'repetitious') or definitive of EDM. Your're 100% right, many classical forms are by their nature repetitive. Waltzes, minuets, rondos are all essentially based on a recurring theme, which is developed and perhaps modulated before returning 'home'. Nonetheless, I do feel that there's a significantly larger degree of a) thematic 'fullness' and b) developmental complexity in these more traditional, instrumental forms. Whilst there is clearly creativity demonstrated in EDM songs like the above one (which is cool

), I don't feel the same level of expressive intention and emotional development in them - it seems like much more of a technically-oriented development (which I think you said, so agreeing there), which is great, but it does mean that the piece falls down on the emotional side of things. Partly because I think actual instruments, being played purely by humans, resonate more deeply with human emotions - it's much easier to replicate the sound of a cry in a violin thick with vibrato than it is with the technology which makes EDM (though I'm not denying that it presents a fairly broad palette of effects). That then is the premise of orchestration and instrumentation - choosing what instruments/groupings to assign melodies, harmonies, certain rhythms to - for example, whilst the trumpet is ideal for evoking the grandeur of a fanfare, the flute would perfect for tender, butterfly-like lines, the effect of which is ultimately a combination of the instrument being played and the way in which the player plays it.
- Also, about accessibility, as Polonius pointed out, it's a neutral factor. If we were to say that EDM is better than other, perhaps older, genres because it's more accessible to contemporary listeners, we would be discriminating on the basis of era. In the 18th century, (pardon the anachronism - just a hypothetical), musicians of the Salzburg Court wouldn't have received a genre like EDM too well I imagine, and so it would be deemed inferior music on the basis that it doesn't resonate with their musical interests (which is somewhat counter to what I'm saying, but anyway

). Similarly, it would be unfair to say that Old English is not a form of English simply because it is so radically different from modern English and thus since we don't appreciate it, we can discount it as a different language. Also accessibility is somewhat dangerous because it can cloud our judgement of less familiar genres, like folk music. We need to assess music with an open mind - cause often, the market isn't always the best judge.