There is a fair amount on the web and in the Tablo forums itself - if you search a little bit. I believe (but this is not an area I’m qualified to give an opinion) that the Tablo internal hardware is probably pretty good.
The tuners (multiple sources) are MaxLinear MxL603
The media transcoder (up to 6 streams) is the Vixs XCode 5190.
Demodulators for the individual tuner streams are Socionext MN88436
I hope they have changed away from the Atheros AR5B22 - that’s 802.11 a/g/g/n only. Not much to gain from using 802.11ac in conjunction with this chip. may explain some of the weaknesses in the WiFi area. Not sure why they’d have a chip that also supports Bluetooth? Note this chip doesn’t broadcast in the 5GHz range, 2.4GHz only.
While searching to find this material again, I also found some very interesting background history (recent - Nuvyyo was only founded in 2010) history. Nothing damaging or derogatory, just fleshing out my impressions of the company.