I've read a bunch on the topic of deco's connecting to the main unit instead of the next nearest unit. I've also read that this is fixed in 1.6.x firmware. Mine are on 1.5.1 and say up to date. Is...

@TP-Link Has this been release for the S4 models? If not what's the ETA? My deco's were working great when I installed them in my new house back in April, but I've noticed recently my speeds are...