I'll just say this. I don't see this as an issue of escalation. The power creep is already here. Because switching lockers is such a pain, people already only stock it with the most efficient and powerful items available. Having the freedom to experiment with a Bloody Sigil prep isn't exactly going to cause a power spiral.
And like I said in the first post, we already have a functionally unlimited locker, it just costs 10-20 minutes of real time to access. I don't really buy into the slippery slope argument that having a hassle-free inventory system will open the door for anything other than a hassle-free inventory system.