My Crestron module has been running for the entire season (using 2.1.6 FW). I have not yet looked at the 2.1.7 FW to see if it requires any changes to the module or if there are some capabilities that I want to add.
My request for event notification was to make it more efficient. Polling works OK but, unlike the mobile app or the Web GUI, the Crestron system runs 24/7. Getting some event notifications would significantly cut down on the polling activity in the Crestron system and the response to some state changes would be more timely.