The point of view of the Roman Catholic church should not be relevant here.  Many faith groups disagree, and are happy to welcome, even marry, gay couples.  

No, he question is not what happens within the walls of the church--that has been decisively answered.  after all, the church is free to refuse marriage to divorced people although they are perfectly free to marry civilly.  No divorcee is suing a bishop to marry in church. ( Indeed, the church has found a way to coexist in the civil polis with those in marriages it considers invalid.   So why are the gay couples any different?)

The question is how to co-exist with all those happily married gay Episcopalians.