In particular, it's now possible for you to do things like configure InfluxDb's credentials or even have multiple different kinds of polling/data logging.
You can also configure multiple datapaths (switches) in the same config file - a forthcoming feature will enable one FAUCET process to control many switches.
Read more about the changes here: https://github.com/REANNZ/
In summary, each switch now as a stanza under "dps", and "interfaces" moves under each datapath's configuration. VLAN configuration is shared among datapaths for the moment.
It is strongly recommended you update your configuration to the new format as soon as possible, as the old format is deprecated and will be removed shortly.