In my humble opinion, which is probably going to be criticized heavily, it is purely the excessive clinging to the core philosophy of the site.
They seem to hope to create a site where you only have absolute questions with absolute answers in a Q&A style. Which isn't necessarily a bad goal, just an outright impossible one, simply because there's almost always at least a hint of personal taste involved.
With the amount of people creating questions on this site, as well as the subject matter which is simply so complex that there's no absolute right for 99% of the problems, you are bound to get questions that can only be answered with anything from a hint of personal taste to a purely personal opinion. This is not a bad thing, especially thanks to the up/down voting system on this site, because when someone with no understanding of the subject at all can still get a good idea of what the general consensus is on the matter. If someone thinks that that general consensus is in bad taste, they can create an answer with their thoughts on it, and receive comments on why their opinion is good or bad in context of the original question.
There is such thing as a good or bad opinion, just not objectively bad or good, but subjectively so. For example, because it may or may not fit the target language or platform for reasons that haven't been known to the author of the opinion yet (everyone's learning all the time), or simply because in the context of the original question it would be a bad idea due to other technical constraints such as maintainability (like suggesting to write everything in assembly).
As long as we're only giving each other constructive criticism and avoid outright flaming or 'my opinion is the absolute right one' kind of answers, everything should be completely compatible with the Q&A style of the site.
In fact, I think it would heavily improve the site, because like I said before, it is impossible to give an answer to 99% of the questions without at least a hint of personal taste. If instead of rejecting that idea we embrace it, I think the entire community of the site will benefit, much more content will be allowed which increases the value of the site for the users, and moderating it will be much more simple because we're embracing that everything comes with a hint of opinion. Everybody wins.
In the same philosophy as my answer to the problem, I accept that my view on the matter is only an opinion, but I do hope it is considered, because I really think the entire site would benefit from this.