Well, it does still work in SuperCruise (transition from normal space to SC), where the Ship will always start off at 100% Throttle (at least does so for me).
Took me a while to figure out why the Ship overshot quite a few times after checking out USS near Stations and then going back to SC....
I guess they "fixed" the Beta condition of the Ship uncontrollably accelerating after System arrival, but forgot to revert the SuperCruise Transition.
Either way, it seems we now still suffer from this new "an arbitrary fixed Throttle position is set upon completion of a Transition, regardless of actual Throttle setting of the Input Device".
I don't understand why they even touched and changed that.
-- edit --
Weird, repeatedly tested it again a moment ago and now the Normal Space -> SC Transition works normal again *scratches head*
-- edit 2 --
Still happens - but only seems to happen when leaving a USS...