A tlud could vent into a kiln, taking the place of or supplementing the rocket stove used in the experiments cited above.
Properly designed, the tlud powering the kiln could be swapped out with an identical one,to have continuous heat with only intermittent tending.
The pit or trench methods have the usual advantage of needing little or no fuel prep.
They also allow for bigger peices to be fired.
It would be boon to self sufficiency if one could fire sections of clay pipe successfully.
A huge earthen ware cauldron would be a sought after work of art, more so if it could be cooked in.
My favorite use would be the creation of rocket stove cores, something that Flip and Jon Anderson pioneered using unfired rocket stoves to power the kiln that made fired rocket stoves.
I think the same techniques could be used with tluds.