I believe that Game Pass is taking precedent over GwG. The past two months have been terrible with titles like Smite and Death Squared. It makes sense that Microsoft would take resources from their old service and instead focus on their new service. People need XBL Gold just to play “free to play” games. You need it for online mp. If the quality of GwG offerings diminish most people will still keep their XBL Gold subs. If Game Pass had terrible offerings the first several months it could cripple the service.
Of course Microsoft is putting more resources into Game Pass. This is the launch of their new company cornerstone. XBL is secure, but Game Pass is new and fragile. Expect subpar GwG lineups for the imminent future. Game Pass is the priority.