Now here's one that sounds like it has some legs … its falisfiable and doesn't involve having to interpret data through the CDM model ...
Annila has taken another look at the way light propagates away from Supernova and viewed it from the older (but largely forgotten concept) of 'least free energy consumption'. The idea makes use of the decreasing energy density along the path of propagation of an emitted photon.
Using this method, he has explained the apparent universe expansion without the need for Dark Energy, it also seems to account for the degree of light deflection around galaxies (presently explained by Dark Matter) ... all without the need for an interpretive model.
A second look at supernovae light: Universe's expansion may be understood without dark energy
A worthwhile read. A very interesting approach.
Cheers