jzzmusician, you say you are accessing the Spotify and Qobuz apps from your iPad and NOT from within the the BluOS app. That's sound like you are running the songs locally on the tablet and sending them to the Node through wifi. If I am correct, the streamer may not be the weak link in your chain.
And as others have stated, upgrading the Node can be a big step forward. I have a Node 130 that has an upgraded power supply and a clock upgrade (both done by Fidelity Audio). I am now demoing the Innuos Pulse streamer to compare the two. They are very close in my system. At this point, I only have one higher end ethernet cable and noise filter. So one streamer gets a more standard LAN cable and one gets the better cable/filter. Both are feeding a Grannyring modified Orchid DAC. The streamer with the better cable and filter always sounds just a little better. I am getting used to the Sense app, it works well and does everything I need it to do without issues. If I had a more analytical DAC I may hear more differences? But I may not be keeping the Pulse.