Oddly, I wasn't bothered by the big reset button because it literally was a big reset button.
And it wasn't.
Not everything reset. The one brother said of his android shipmate, "Maybe I've just got a little tiny scrap of decency" -- echoing the Doctor's words from earlier. And did anyone notice the photo of the brothers? In the beginning, Android brother's image had been torn off, but after the reset, there was Dad and his three boys.
Clara seemed surprised when she found the pool, after the reset she was dressed in swimming clothes with a towel 'round her neck.
This reset left echoes.
Also ... was that telescope in the observatory the Endeavor from "Tooth and Claw"?