The "core" stuff is all there. The bugs get fewer and fewer with each passing day. The faster file deletion is a big help (now my bottleneck is NFS once again, which is to say "not much of a bottleneck at all").
Not too many pieces missing now. Powerdevil is there and works great, but needs a more obvious interface (using Krunner is great, but who is going to know to do that?). Amarok2 needs to get done. And someone needs to work some magic with Solid and make a KNetworkManager replacement.