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It says right at the beginning that the first section is an overview while the second section is more technical...

So? It needed a section with more polish than the first section for not HN, and a more detailed technical section.

Both would have been ideal - Ideally the webpage would have been a public-perception-focused with simple explanations (syringes with compressors!) and the concept sketches front-and-center, with a link for a more technically oriented whitepaper. That would have taken a lot more time though - the linked pdf is still impressive.

I think the occasional mention of safety on high-speed rail is a bit unfair, considering that good systems like the Japanese Shinkansen have never had a fatal accident:

"Risk of derailment is also not to be taken lightly, as demonstrated by several recent fatal train accidents."

There were two fatal high speed accidents just this summer in Europe-- the Spanish one killed 80 people.