First Wang 2005 is incorrect in so far as the minima of 22/23 is the same as 23/24.The degradation of the PMO6V radiometer has been well identified eg Frolich, Svaalgard,discussions and more recently Krivova 2011 ie the minima 22/23 is overestimated by 0.2wm2 or to put it another way the ar5 models are already wrong,
Second the distraction of looking for cloud nucleation correlations in GCR tends to reduce the importance of energetic particles effects on both dynamics and surface climate ie a distraction.
The importance of energetic particles of differing energy on atmospheric chemistry has been well described in the literature eg Crutzen 1975,Thorne 1977,and the background levels (persitence) through the solar cycle need to be taken into account.
The influence of GCR and EEP on surface weather is discussed in a recent paper M. Calisto et al.