It's important to keep a couple things in mind here
1) While its true that the IWC tends to prefer heels to faces, we can't discount the fact that this particular era of WWE forces all faces to be lame, smiling cornballs and select heels are really the only ones that get to have any sort of personality. So despite IWC tendencies, its hard to fault them on this one because heels today simply ARE objectively better than the work WWE faces are doing.
2) Similarly, while there is the nostalgia factor that makes every past era seem better and compare favorably to the current one, we again cannot ignore the fact that apart from all of that, the product today is legitimately worse than its been in some time. A lot of that is the PG bullshyt restricting everything and forcing everyone to cater to a 9-year old fanbase more than ever. Attitude era > "Ruthless Aggression" > PG/today. That's not nostalgia or smarks always disliking the current era. No, those are facts.