There is a pretty big difference in the tactile feel between spamming one button verses spamming a sequence or cluster of different buttons. I think, and I would like to think that devs think as well that the tactile feel of a job is important. Condensing combos has the potential to break the functionality, and aesthetics for jobs, and should not be a blanket solution for all combos, and should only be considered with function, and taste in mind.