I’ve asked Samsung if there is a date for the update to reduce the 2 degrees to 1 but nothing planned as yet.
Our thermostat is only really a “top limit off” device and I’ve found that the Samsung water law works reasonably well to maintain a temp of around 20 degrees without touching anything so we are reasonably cosy…
I have a selection of Arduino based DS18BW thermostats I use with 1/2degree hysteresis and I am occasionally tempted to try using one as an external thermostat.
I posted an update on my Homely Controller a few days ago.
tldr; I disconnected it as I wasn’t happy with the performance, but may have found another option to change the WL setpoint throughout the day using the Smart Grid Control settings.
I’ve added a home assistant link and I’m able to play with the hysterisis by enabling/disabling zone (not as a thermostat, keeping the water law effective) to control thee hysterisis with fine grain.