You can now install new TeamCity plugins directly from the JetBrains plugin repository (in addition to the existing ability to install plugins manually).
No server restart required for the new plugins installed either from the plugin repository or manually.
Updating an installed plugin can now be done via the TeamCity Web UI. If automatic checking for the plugin updates is enabled, TeamCity will perform it on the server start and then every 24 hours. You can also check for updates manually using the new button. At the moment you still need to restart TeamCity for the update to take effect.
Development of reloadable plugins