Asking questions or having roundtable discussion with the final 3 would probably be detrimental to the person who actually deserves to win.
Would make things interesting, but imagine a scenario like this year where both Kaycee and JC would have taken Tyler to the final 2.
Now imagine giving him an opportunity to explain why he deserved to win, and getting through to the jury...neither Kaycee or JC would be taking him after that
.