To know if it could be improved would require investigation into the data rate limitations and if you are dropping packets with your current set up. There are ways to determine this. If you are not having issues with the system, meaning it is functioning properly, than changing to another properly functioning system that performs the same and under the same standard may not yield better results.
What can I do between the wall and my streamer/DAC?
I have AT&T fiberoptic internet and the AT&T supplied router. I then have generic ethernet cable to the music room in the basement to the back of my Lumin T2. Is the anything I can do to make this a better sounding situation? I feel it sound very good as is, just wondering if I am leaving some goodness on the table with this set-up, Thanks, Allen.