Dunno what happened to v1.15, but apparently there is new firmware available for the original GOControl panel (not GC3).
As far as I can tell, it doesn’t appear to add much for alarm.com users. It add support for a new provider (Securenet), and removes support for Uplink and Telguard.
New equipment codes for the GC2 with 1.16 are as follows:
(1067) 2GIG Repeater
(1068) 2GIG Translator (Coming Soon!)
Updated Zone Types
A new zone type has been added to firmware version v1.16. The zone type is selected by the installer when pairing the panel with peripheral
devices that utilize localized troubles (such as RF jam or AC loss detected by the peripheral device). The new zone type is as follows:
(32) Remote device
The Alarm CIDs for the new zone type are as follows:
(338) LOW BATT
(342) AC LOSS*
(344) RF JAM
It add support for a new provider (Securenet)
Also IControl One support.
As far as I can tell, it doesn’t appear to add much for alarm.com users
Looks to be the case. No other additional changes listed beyond the above Zone Type addition.