While playing the pipe organs in cathedrals or churches with huge echo/reverberation, I noticed that along with the delay/latency (when the pipes are not close enough to the ears) comes the second problem: the reverberation.

How does the organist deal with that?

In my experience I noticed that if I slow down the tempo, that helps a little bit, but I have the feeling that is not enough and may not work always.

On YouTube I noticed an organist was shortening the note durations (playing them as staccato), making the sound a bit clearer.

Are there any specific techniques to make the melody clearer while playing in such big cathedrals? Could it be that in the place designed for the public the sound is clearer than where the organist plays?