First of all, thank you DoG for the fantastic thread. It's a very compelling piece of analysis.
The thing I am struggling with here (And in much of the assessment) is peak vs career value.
Take Smith who is likely to be top five in this analysis. Assume from tomorrow on, he played another seven years of above average but not great cricket (say a 45 average). In this anakysis, this would take away from his ranking / greatness, which makes no sense as in addition to his ATG period, he still added seven years of above average value.
Similarly, I'm sure if Tendulkar retired in 2001, his rating would be higher despite providing at least ten more years of considerable value, one year where he was probably average and one below average year.
Baseball analysis does this well with the WAR and WAA metric (wins above replacement and wins above average), where one's performance is assessed against a "replacement player" and an "average player". It's considered the appropriate metric for year on year and career value. Would be interesting to translate this to cricket.
That said, I also get the purpose of this exercise is also to give value to the Headleys and Pollocks who had shorter careers.