Depends how you look at it, doesn't it? If they start Bell because they're impressed with his progress, then that's a plus. On the other hand, if they're saying Walker can't cut it and this is a desperation move to find anyone who can man that spot, then yeah, it doesn't reflect well on them.
I don't think anyone, from the FO to Walker himself, ever saw him starting at LT as anything but a stopgap.