This includes ~100 new input trees, mostly in Cnidaria (thanks to a clade workshop at the Field Museum) and Aves (thanks to Joseph and Ning in the Smith lab). You can see details and browse the release notes here:
The other major new feature is an easier way to add trees to synthesis. Now, directly from the tree list, you can click a single 'Include' button to queue a (sufficiently curated) tree for the next round of synthesis. We hope that this will more quickly get new submitted trees into the synthetic tree.
Let us know if you have any questions or suggestions!