Curiosity: No. None of those issues (or any other that can be thought of) exist outside of Halachah. D’kulo Bah. You can find the answer to all of these in Torah. And yes, it could be that the Halachah is “Muttar” to wear colored shirts but a Yeshivah or institution will decide to have a dress code where they only choose certain colored clothes. Do you C”V think that when R’ Ovadia Paskened that “land for peace” was acceptable that it was out of political or personal feelings, or even out of a very well-educated guess (which is really what your definition of Da’as Torah in this case turns it into) as to what’s right? Of course not. He knows Torah and found a Ra’aya in Torah. It was a Halachic decision. Just like the current Gedolim’s struggle to re-work the Tal Law comes out of their knowledge of Torah. B”H every question, whether minute or huge, has an answer in Halachah. Every tiny detail of our life can be found there. There is no room for any outside considerations, even if we hide them under the guise of “Haskafa”, to override that.
So if you really want to say that “Hashkafa” comprises of how we decide to treat the areas of Halachah that are Muttarim but not Chiyuvim, I can’t disagree with you. But that’s not at all how people use the word.