I for one am not over looking Hager. I wanted to see how they used him. I actually like him more than Kiser. He's far more versatile. He's got safety type speed and good length. He can match up with RBs and TEs in coverage.
The problem with Littleton (4.73) is his lack of speed which limits the coverage options. He is a strictly zone cover LB. Littleton got burned twice today because he couldn't play man coverage. Kiser has marginal speed in coverage (4.66), but more than that he has very poor technique. He will need intensive coaching up in that area.
Until I see Kiser play I'm not going to pass judgement, but right now the known factor is Hager and I'm glad to see him getting reps.