Bishops don't attend conferences/courses designed to introduce them to other models of community.  Many of them don't really read anything about this.  And at the USCCB meetings [and I know this for a fact], they don't discuss this in general and few engage even in private discussions about declining numbers of Catholics and other models of either:
1) running parishes
2) alternate communities

They are too tied into "We HAVE to do it this way" [says Who and Why].  Bishops' Synods can come up with alternatives.  Of course, having the laity invited---not as auditors, but as participants is a major KEY.  But the Bishops would have to change their attitudes---sadly, in which it would be easier for leopards to change their spots.