Did you even bother reading his recent interviews or just post "How you feel about his leaving"?
Mike Morhaime was making $12.3 million a year before retiring. So, he went to a advisory role and then quit altogether because he wanted to "retire". A year or so later he is back to work. Nothing about that makes a bit of sense according to the "people just leave". I cant find any records on his new yearly income for his new company.
Do yourself a favor. Take 3 minutes and skim through his interviews. He was not at all happy with the direction and employee treatment at Blizzard. Not to mention the news reports of exactly that, that Blizzard pays and treats employees very poorly. How would you like to be paid in skins from a dead game (Heroes of the Storm) and charged full price? Surprise, we gave you HotS skins instead of actually money...arent you thankful?