Is this just a limitation of Deco devices? On a Satellite Deco, if one connected device is doing something heavy, for example, downloading, then it will tank the performance of every other device connected to that Satellite Deco.

Also if, for example, I'm downloading something on a device and run a speed test at the same time on that device, the speed test will return very poor results. 

This doesn't happen when you just have a router and stay connected to that, even poor routers.

I was just wondering, is this behaviour normal for Deco mesh systems, and is there any way around it? 

Secondly, I've been testing a few different Decos lately, just by adding them all to the Network then taking them offline once tested. Even though they're offline after that, could this impact my network performance overall? I've had my Deco setup for a while, could it help just resetting the whole network? How would I do that when my Superhub3 is in modem mode please?

Thx