Since this is over Wi-Fi, is it over 2.4Ghz or 5G Wi-Fi? 802.11n, AC, or b/g?
What are the Mu-MIMO, WMM, or QoS settings? Is all traffic on the same VLAN?
Most Apple devices now support 802.11ac, so if that’s an option, I’d enable it. If your router supports Mu-MIMO or WMM or QoS, any of those technologies could also help throughout and consistency of service, avoiding “noisy neighbor” scenarios, and making sure your Tablo doesn’t choke
Also, here’s the link to the router I bought:
It serves about 15-20 Wi-Fi endpoints admirably, allows me to stream 4K content without playback issues, and serves Tablo content over my LAN and remotely, without issue.
Not sure what kind of router you have, but if it’s older or doesn’t support the settings I mentioned, the TP-Link would at least be good to test with and won’t break the bank.