I would regard projects like COMPare, which rate studies after publication, as much more valuable than preregistration. Yes, preregistration reduces researcher degrees of freedom, but it also increases red tape. Ioannidis mentions how researchers are spending too much time chasing funds. Preregistration increases costs (in terms of extra work) to the researcher; encouraging them to chase more funding. Increasing quality will likely require reducing the cost of doing higher quality research; not increasing it. Yes, I'm aware COMPare is using the preregistration to rate the studies, but that's just one method. The question mark for me with preregistration is: what is the opportunity cost? If researchers are now spending this extra time figuring out exactly what they plan to do all from the beginning of the study, and then filling out preregistration forms, what are they not doing instead?