In terms of today's social standards and business marketing, "almost nobody" is practically equivalent to "nobody". I don't make the rules of society; that's just how things are in the world. A few thousand potentially offended people (at best) won't affect the bottom line for a business that caters to potentially millions nor their parent company that caters to potentially hundreds of millions, and don't get on mainstream news for more than a few moments at best before quickly forgotten in the cycle. Is this a good thing? Maybe not, but it is what it is.
Given how popular the view of Olympians as mythological beings rather than actual gods is, I'd expect that almost nothing would change in how they're treated in the new PHB, assuming they have any tables of deities at all.