Fixed vs All Flying tail

Apart from the *better* handling of a fixed tailplane,
is there any aerodynamic advantage of a fixed tail/elevator
over an all flying tail?

I can't help feeling that when the stick's not in the
middle the fixed tail/elevator looks less efficient

(And I used to prefer the light stick forces and not
needing to constantly re-trim, when I flew a Cirrus,
rather than the Discus I have to put up with these
days - but NO I'm not offering to swap :-) )

Kevin