My favorite merged 9.4 features missing from this post:

* GIN optimizations for smaller index size and faster search. This should mean faster full text searching

* Time delayed replication standbys.

* CHECK OPTION for auto updatable views, I believe the constraints were slightly relaxed on which views can be updatable too.

* Replication slots looks promising, this should make it easy to setup a replication slave which does not have to be reinitialized on long network failures. No more WAL shipping needed.

* Printing the planning time in the EXPLAIN output (only since I wrote it myself).