I don't think the page creator is a BCash fan. I guess he's still struggling with the algorithm. In an earlier version, for example, Bitcoin had a much higher valuation and BCash a lower one, but Stellar (if I remember right) had an almost as high "fair market cap" as Bitcoin  .

I still haven't totally grasped part of his mechanism, in particular the "basket" concept. I will look into it deeper when I've time.

Agree. I would begin strictly separating "coins" and "tokens", as they have often a totally different usage scenario. And I would like if these sites again allowed to filter pre-mined currencies, like CMC did some years ago.

I guess the "dominance-boosting" effect would be even stronger - altcoiners (or better: "shitcoiners", as not all altcoins are shit) would directly cash out to fiat and the altcoin price would go even faster near zero, without touching Bitcoin (Bitcoin also can be driven down by altcoin sellers cashing out via Bitcoin).

Don't know. On their website they list four "testimonials", some of bigger banks like Santander (the German bank I mentioned isn't among them).