I don't think it addresses the core issue and creates additional ones. There are people who have valuable opinions who won't post them if connected back to them

I don't think it addresses the core issue and creates additional ones. There are people who have valuable opinions who won't post them if connected back to them. There are people who won't bother getting verified who would otherwise leave honest reviews. The bad players will find a way to get verified and now you're worse off than before (fewer legit reviews plus bad ones with a fraudulent stamp of approval). Whatever the solution you have to take into account that bad players have a higher incentive to pass your test / jump through hoops than legitimate people do.