If you do a comparison of where a $7 million cap hit falls in line with other defenseman around the league then I think that's high.
Shea Weber - $7,857,142
Ryan Suter - $7,538,461
Kris Letang - $7,250,000
Brian Campbell - $7,142,875
Dion Phaneuf - $7,000,000
Drew Doughty - $7,000,000
Zdeno Chara - $6,916,667
Alex Pietrangelo - $6,500,000
Erik Karlsson - $6,500,000
Also consider that when Lombardi was talking about how negotiations were going with Andrej Sekera in an interview he said the number they were asking for in negotiations was "reasonable" and something he could work with. And granted it's a relative term with no exact numbers involved, I don't think Lombardi would classify it that way if Sekera was asking for the same kind of figure as Drew Doughty -- even on an AAV basis.