Z-Wave devices disconnecting

my older z-wave devices keep disconnecting (honeywell thermostats and honeywell light switches).

z-wave repair is totally stupid! for example, kitchen lights, which is 25 feet line of sight, routes around the house; while another device routes from garage to kitchen light then to hub! wtf…

we need tools to set the routes manually, plus signal strength map… until then smartthings is just a toy!