The Shu"t Min Hashamayim was written by a Rishon who would receive answers in dreams from Heaven. Is there a difference in Torah views regarding how to weigh the halachic perspective of such a work? (i.e. The Chida (Yosef Ometz 82) seems to favor the sefer at times, but do others agree/disagree/neutral leaning)
Rav Reuven Margaliot presents a survey of sources from Chazal through Acharonim in the introduction of his critical edition of Shu"t Min HaShamayim, in which he makes a very strong argument that dreams play a pivotal role in deciding Halacha, peshat in a Pasuk, and more.
Rav Ovadia has a few Teshvuot (Yabia Omer vol. 1 Orach Chaim 40-42, vol. 5 Orach Chaim Siman 43, vol. 9 Orach Chaim Siman 103:5; Yechaveh Daat 1:68) where he argues with the Chida and rereads some of the aforementioned sources in disfavor of asking Halachic questions Min HaShamayim. In fact, according to the Rambam, asking questions min hashamayim might be tantamount to Navi HaSheker! (middle of Yabia Omer 1:OC:40)