As others have said, if you are looking to make your show sound better, start with the FOH speakers. The Expression is not a bad sounding desk IMO.
If it is a workflow thing, then you might be looking at a different desk as the Expression is among the lowest functionality digital desks in its class.
Let us know what you end up with!
I really liked the sound of my GB8, which is the biggest reason I stayed with Soundcraft when I switched to digital. I like the sound of the expression, was just looking for a little more functionality, but I might can get some more mileage if I start running a separate monitor console like I said, as that would free up some busses that are currently on monitor duty and let me convert them to subgroups.
I just upgraded my subwoofers to the active JTR captivator 212 pro’s. Need to do a little system tuning, but their first show will be in a few weeks. Need to rebuild the bank account for my next big purchase. My current mains are Yorkville U15’s.