I love, Love, LOVE, LOVE the idea of adding WHA stats.
1) Philosophically, it helps to answer the question "What If". On this level, there is no space to entertain the idea of NOT adding the WHA.
2) Game-play wise, I personally like the idea of owners who have pet templates that consistenly win having their worlds turned upside down.
3) This is a wonderful opportunity to fix the defensive rating. Two main things need to be done here,
First: take PIM out of Def rating.
Have PIM influence how often a player takes penalties.
Have Def rating reflect how good of a defender a player was.
"And never the twain shall meet"!!! (Look at Bobby Clarke as a player who was an awesome defender yet took lots of penalties (at least in some seasons).)
The Selke Trophy winner should earn the highest Def rating a forward gets in a given season. In Montreal, in the 70's, I don't think you would find any hockey analysts who would claim that Steve Shutt and/or Guy Lafleur were better defensively than Bob Gainey. They shouldn't have higher Def ratings.
Second: stop having Def reflect how good of a season a team had**.
Seriously. What is up with the 1974-75 Kings? Is someone trying to tell me that Sheldon Kanegeisser, Larry Brown, Terry Harper, and Bob Murdoch EACH had better seasons defensively than ANY season Rod Langway ever had, including Langway's 2 Norris Trophy seasons? That is just crazy.
Or that Doug Harvey's 68-69 season was worth a 96, when so many of his Norris seasons earn ratings in the low 60's?
Or that Borje Salming's 76-77 season, in which he was the runner-up for the Norris Trophy, was a First Team All-Star, had a +45 plus/minus, and finished fourth in Hart Trophy voting (with 40 points, behind Lafleur, Clarke, and Vachon) is worth only a 69 Def? This season should be worth a 90, imho.
**Some teams, like the 76-77 Montreal Canadiens, would be expected to dominate Defensive ratings for a certain season. I just suggest that the 74-75 Kings and the 68-69 Blues are not 2 such teams.
Please add the WHA stats! Of course, the Def for most of these players should be (quite a bit) lower than their NHL counterparts (but not all the players would be less than 10 I don't think). But there would be some players who were defensively responsible, like Gordie Howe.
Look at Blaine Stoughton and Mike Rogers...they didn't explode offensively until they escaped the WHA and made it to the NHL...so it is not like the WHA was entirely lacking defensively...but overall I agree its Def should be lower
Sorry to ramble, it's late...