I'm having my dealer look into this as well as I have two different behaviors in our '11 Outback and my new Legacy.
The outback (and every other car I've ever owned with Homelink works with no acc)
The legacy requires acc to be on
Security makes sense, but it's a departure from how it's operated in the past.
2015 TBM Legacy 3.6R
2011 ABP Outback 2.5i Ltd
Past: 99 Impreza L, 04 WRX Wagon, 05 Legacy GT, 06 WRX Wagon, 05 Legacy GT Ltd, 08 STI, 13 Legacy 2.5i, 15 WRX