Good to see that a lot of great minds think alike!! :) 
The only good use for a USB hub -- 
I love those USB extension cables , I have up to 3 on both my DAW and office computer. That way you don't have to pull the CPU out when needing a port. 
Front ports always seem iffy. 

No lag on the wireless mouse, but the wired mouse does what you described. Only in Sonar though, not with other typical use.
 

I find these problems occur if I have the Logitech transmitter plugged into a USB3 hub with other devices plugged in.  I just keep it alone on a USB2 port.

I also use the extension cable for my Logitech on a USB2 port. Receiver is about 8" from both the keyboard and mouse, wifi is just under 3' away, no issues. The automatic channel assignment may be impacting in areas where conflicts arise dynamically (i.e., the channel gets interference while up and running), but I am pretty sure it will scan and retain the cleanest channel otherwise.

There are 3 non-overlapping channels for 2.4 GHz wireless: 1, 6 and 11. The ones in-between have some degree of overlap in frequency space.
 
This is only true for 20 MHz bandwidth channels. Some routers allow 40 MHz channels (called Mode 300 Mbps on my Netgear router, also perhaps called Wide Mode, or something else). Wider channels imply more overlap, so use 1 and 11 if using this mode.
 
You may have seen this, but it explains that Logitech mice don't use a fixed channel. They search for an empty channel.
https://forums.logitech.com/t5/Mice-and-Pointing-Devices/Unifying-receiver-interference-with-WIFI/td-p/843472
 
So perhaps the channel width is the key here. I don't know if the power setting you talk about is the same thing or not.
 
Cheers, Peter.

I use a bluetooth mouse, and the signal drops every once in while...it does lag when I'm trying to download something...and all the wireless signals get crossed...oh yea, the bluetooth speaker, watch, wifi, mouse are frying my brain lol.  It's probably something to do with this!
 
Ben

I've used a Microsoft wireless keyboard and mouse for years with Sonar and experienced no lag issues. I do in some instances hear the 'zipper' noise when using the mouse for dragging panes or zooming in/out on the timeline.