You are missing the point, all lists of this sort are stupid, none of them use any kind of system to rank or measure one player against another, it's all left to vote averages based on votes from people who like one player over another for their own reasons - many of which are likely biased. That top 100 list has as much credibility as a top 100 list created by HF poll, the difference is many of the media members who were asked to vote write about hockey for a paycheque while posters here do so for free.
If the HHOF, who have achieves of old film, transcripts of interviews and access to numerous hockey historians and alumni to a degree the NHL even doesnt, wants to compile a list such as this I'd take it seriously, less they didn't research and thouroughly discuss their list, which I'm sure they would. Until then, lists like the Top 100 will get the criticism is rightfully deserves.
And it's not even that it was a bad list with obvious omissions, and which heavily favoured players of more recent times (it did both). It's that all the voters where simply given a vote card and told to go nuts with no conversation, and no consideration on if some of these voters are even familiar with all the players they are voting for or against.