Ayodele is playing well IMO. Both he and James are slow in pass coverage but at least Akin blows up blockers and makes plays in the running game. If you're big and slow, you have to at least play big, like Trotter. If you're big, slow and cant win physical 1-on-1 battles then a change has to be made.
Singleton is clearly a fish out of water being asked to play 3-4 LB. Carpenter and Burnett, we just have to hope they improve with experience but who really knows....