Sort of resolution. Device OS 1.4.2 is much better but I am seeing a problem with gateway not being stable. I have had 8 endnodes connected so you should be good at 5. Not sure whether you use it but I have experienced some problems with the PublishQueueAsyncRK library that have been solved with the very latest release of this 0.1.2. I have found that it is very easy for the Cloud publish queue to fill and in 0.1.0 and before of this library this wasn’t being correctly handled. See PublishQueueAsyncRK publish hanging
I have also implemented a FRAM storage device on I2C to provide a reasonable size of publish buffer and for my critical sensor data a Mesh publish with ACK. This is necessary because I was seeing mesh publishes being lost - See Mesh pub-sub at the gateway