...
If you use Perforce jobs to label your commits, the changes associated with jobs are now marked with a "wrench" icon 
in the TeamCity UI. Navigating to the icon opens a pop-up with the job information:
...
Refreshed web UI
In this EAP projects and build configurations as well as collapse/expand actions received new icons. Overall, the UI boasts of a refreshed look and feel.
...
- It is now possible to run a custom script on the launch of an Amazon EC2 instance (applicable to instances cloned from AMI's only). The Amazon website details the script format for Linux and Windows.
- Unique hostnames for Windows vSphere cloud agents on can be specified now: when adding an image, choose a customization spec in the corresponding field. The option is available for Linux VMs as well.
Bitbucket Cloud Issue Tracker
TeamCity comes with built-in support for many of issue trackers, which now include Bitbucket cloud. The integration with Bitbucket issue with Bitbucket cloud issue tracker can be set up separately, or as a part of TeamCity integration with Bitbucket source code hosting service making it easy to connect TeamCity to Bitbucket issues.
...
- the bundled Ant is updated to 1.9.7
- the bundled dotCover is updated to 2016.1
Git LFS support
TeamCity now has support for Git LFS if checkout on agent is used.
Other Improvements
performance of the project and build configuration settings editing has been greatly improved
you can now redefine inherited artifact dependencies in build configurations, the same as agent requirements and other settings
- a new option of the Free Disk Space build feature allows you to fail a build if sufficient disk space cannot be freed for the build
- fixed issues
...