User blog comment:Masseffect7/Casey Hudson Leaving/Mass Effect Trilogy Rerelease/@comment-743796-20140809000711

Personally, I think Casey Hudson was hamfisted and stonewalled while attempting to cater what the fans wanted while balancing BioWare (and ultimately EA's) needs for the franchise. Additionally, although he had some role in ME3's poorly-executed ending (albeit improved slightly with the extra DLC content), Ray Muzika and Mac Walters had more responsibility for the debacle.

As IGN was stating in one of their videos on the matter, perhaps this was the best time for him to leave the series, and we'll see what happens going from this point.