@vchlum absolutely no issues with the PR raised, it is quite well timed. Actually, several tools do emit “informational” messages to stderr. I guess the point really is not about error or warning, rather what you consider as “output” of the program.
Now that all said, I do recognize that the practical number of real world scripts that might be currently parsing qsub output, especially in stdin mode is probably very close to zero. Thus, maybe, there is no real impact, and it is only theoretical. So, if you feel strongly about using stdout, I am fine with that.
Thanks, as always, for the very useful contributions.