As long as CIM exists on its own, it's a reminder of a fairly notable and embarrassing problem for FIDAC, and NLY by association. So there's a strong incentive to make CIM disappear.
However, such is probably not so important a consideration as to be a major driver behind acquiring CIM. It's interesting to note that NCT is doing the opposite of what NLY appears to be doing; that is, NCT is separating their residential mortgage investments from their commercial mortgage operation.
I'm indifferent as to whether NLY purchases CIM, but I am concerned that CIM has been much less aggressive because of the restatement problem. Without going into detail, CIM seems to use a process for issuing Re-REMICs that immediately results in generating some amount of taxable income, so I believe that the accounting problems have been a major factor in reduction of the dividend.