Yeah, losing Hader is a blow. Sudeikis...not so much (and I say that as a real fan of Sudeikis, but I feel like he's mostly been sideline for a while now).
But I think "sinking ship" is a bit alarmist and doesn't recognize the talent of some of the featured players. Cecily Strong and Kate McKinnon have been two of the best things about the show since they joined. Jay Pharaoh also seems quite talented, if grossly underused. Aidy Bryant also usually shines when given an opportunity. I'm all for letting these talented cast members move up and do some even more heavy lifting.