I've always been conflicted with the general disinterest with Locke's story. His, and many other characters', introductions confused many fans who felt that they could not connect with any of the cast. However, I believe, an arc that focuses on Locke overcoming his obstacles in any way, would certainly help his overall favorability with the Halo fanbase.
The Return of Locke
The Return of Locke: "Chief.. Hyperius humiliated me, left me for dead. As long as I'm on Zeta, the Banished will suffer for what they've done." I put together a kitbash of Spartan Locke using Halo 5 and infinite assets. It was an ordeal to put together the materials to add wear and tear to his new armor, but thankfully this premade armor file for Blender has a custom shader that you can tinker with.