Its possible I admit. MS do have a long and inglorious history of using the most brutal tactics to pursue their business objectives.
Obviously though, I really do not know the actual events and motivations but I'm pretty confident in my ability to judge patterns of behaviour and performance. And in that regard Kamiya has delivered reliably for years, whereas you simply cannot say the same for XGS as publisher and external production partner.
Its like a champion fighter switching camps and then shockingly underperforming in their next bout. Sure, they are human, and everyone can have a bad night. But when you look at the new trainer and their history isn't nearly so impressive... Its hard to squarely blame the athlete even if they feel the need to take the responsibility publicly.