It may not be everyone's ideal, but I think it is a consensus attribute when we speak of "firm and fast" in context with maintenance meld. It is a sliding scale of what we interpret as ideal-firmness, and speed, however. I think consensus of the participants in this discussion would exceed >50% believe 'firm and fast' is an ideal. But, if it is firm and fast on a course presented with narrow fairways, and too thick rough, not enough intermediate cut, then the ideal becomes a negative because the playability factor of enjoyment or strategy becomes restricted.
Walkability may be a consensus ideal, however once again, it is not universal. There are probably great courses that aren't walkable at all, although I can't think of a single one that is consensus 'great' if it isn't walkable. Can you?
Ross and MacKenzie obviously struggled with this set of ideals in their points of what defines great architecture. All we are doing is carrying on and oft repeating what has already been suggested as ideals by the greats. I don't think it is arrogance, because I think most all of us know the difference between 'ideals', 'our ideals' and 'universal truths'. It is all about consensus, and that rarely gets over 50% on any attribute, it seems to me.
Added: Tom, I think most architects strive for variety from hole to hole through a course design's 18 holes as an ideal. Obviously. But, do great architects strive for variety from project to project? Do some architects and builders strive for a consistent theme, construction style, method of attacking the land as a project of staging (what to work on in some chronological or strategy of construction phasing order)? Does that lead to lack of variety?