I'm going to point something out. This is incredibly similar to trends that happened back in outer sect. Arguments that some people take priority and should be done now, so others get pushed back for unspecified 'later times' that never come. It's why we stopped associating with Han Jian and Xuan Shi and barely associated with Gan Guangli and Gu Xiulan's cousin.
Those arguing for Li Suyin have some water, in that Li Suyin isn't going to advance on the particular bond prompt without us taking that action, but the same is true for Xuan Shi. Whatever the favor is, it's something he interested in advancing on, and wont do so until we take that prompt. Sure he has other fields to progress with as well, but so does Li Suyin (cough cough finally advancing to green cough cough). Li Suyin isn't dependent on us, and while descending into the pit is something Ling Qi can help her with, I do not see why we should consider it anymore time sensitive than repaying Xuan Shi's favor.