Same here

There's also this (c. 106):

Harry turned, and set foot on the giant plant, and began to walk down the spiral staircase provided by the leaves. It had taken Harry too long this time, but he'd recovered himself to some degree, despite the grief still weighing him down like thick water. It wasn't a cold steel rod in his spine, but it was something straight and solid nonetheless.

That might be the case, but we have the breaking of the tradition of Dark Wizards teaching Battle magic as independent evidence for the murder.

Made it into a Horcrux, obviously :)

That's not one of the plans listed as unimportant. The relevant part was removing or weakening her influence on Harry, and this was achieved by the Troll plan when the original plan failed.