what sucks about Littlefinger dying

We'll never hear his motives from the horse's mouth. Granted, I can't imagine a scenario where we ever would've. There's no one I'd trust him to be fully honest with, and a scene where he was just chatting to himself would be hard to conceive a reason for, and come off weird. And it's fitting of course that his mysteries die with him. But still. I wish we could've found out some way whether he genuinely cared for Sansa, or if she really was a tool. I assume somewhere in the middle. He cared for her, but only to a certain point, and would've tossed her away if it benefited him. If you care for someone, you don't go to such lengths to sow discord between them and their siblings.