Insofar as alignment continues to promote overlapping sets of characteristics (e.g. helpful, harmless, honest, corrigible), should compassion be one of those characteristics?

not sure if you mean compassion towards AI or compassion of AI. I assume the latter. 

not related               

for AI's I dont' think there is a difference between role-playing misalignment and being misaligned

If animals continue to exist in a post-AGI world, animal suffering will not persist. I don't see the relationship between those two things.