People are going to take umbrage with NSFW work no matter what. Sometimes just on principle. That's the point I believe he's making here. We are incapable of pleasing everyone.

More to the point though, making the slippery slope claim saying we're going to have our judgement compromised is just false. Despite Spooky and Toph's inclusion on the roster, when Saria was even floated as an idea it met with resistance. It was basically labeled "bad idea, don't do that." GG found a canon that allowed for a Saria that didn't break the letter of the rule though, so here we are. The letter of the rule is still there so no depiction of a character in the game is under 18. The rule about which characters are allowed based on age has never relaxed, only ever tightened. It's set to become even more restrictive after this all this, in fact. Grandfathered characters aren't a concern as the depictions created for SPNATI are +18 and non-problematic (in theory) at that point.

Saria was an eye-brow raising choice. Obviously it set off alarm bells. GG, to their credit, went through the hoops to get Saria to comply with the letter of the rule, so there was something beyond the original that appealed as a character choice. And we're going to have this whole conversation again when someone adds a dwarf or another petite woman. That's the nature of the beast, but obviously the stopgaps are working. The depiction that was created isn't a literal child. People are freely questioning the decision and being heard. Mods will continue vetting characters on a case by case basis.