The most obvious balm is a logical replication solution. Unfortunately those require non-trivial implementation, but it's something that is in its broad generalities not controversial for inclusion.
Dimitri Fontaine has posted a large patch to implement a devilish component of that, DDL/Command triggers, receiving a lot of detailed review and attention: https://commitfest.postgresql.org/action/patch_view?id=768
But I think a cohesive solution can only be realistically realized in releases >= 9.3.
