Hi,
When doing Export Audio Mixdown, you can have split channels, interleaved, mono or L/R from surround.
Would be nice to have move advanced option to allow… Center only from surround or Rs/Ls interleaved or… whatever combination of those + Down/Up mix rules. That could allow to store user presets like say from a 5.1:
rule 1 remove Lfe
rule 2 send C(-3dB) to L&R
bounce L/R result interleaved
bounce Ls/Rs unchanged interleaved.
and export in one job.
Cinema mixers that I work for ( 
atchusing protools ) want L/R and Ls/Rs rather than 5.1 or quadros.
For now the only way is to bounce split channels, then recombine what’s needed within nuendo… then delete all unused audio files, then delete all generated tracks (wich comew with the risk of deleting other audio files and tracks if using the Divide Track List