Agreed. It would be basically the "arrogant Sony" meme come to fruition. Goodwill can only take you so far, and having a more expensive and weaker console than your competition would be a megaton disaster, almost as bad as the Xbox One and PS3.
Sony are competing against PS4 launch aligned and it would hurt them in that sense but Xbox isn't a factor in large parts of Europe and even though Sony isn't doing well in Japan Xbox is a non factor there as well and will always be regardless of what Microsoft is trying to do about it. I'd say the worst case scenario for Sony is that they lose the UK and the USA and maybe one of the mainland EU countries that isn't Sonyland and they'll end up only outselling the new Xbox consoles by 10-15m units by the end of this generation.