New Shield TV Owner!

Hello, I just bought my Shield TV Pro as a replacement for my Roku Ultra LT in my home theater room. I've connected it to my plex server and the mbps increased SIGNIFICANTLY, from max of 92mbps to 600mbps. Large 4k movies load INSTANTLY where it used to take a few seconds and would buffer infrequently if I added subtitles. Absolute night and day, including on all the streaming services.

Is there anything else I should do to my Shield?