Even without that feature, it's already arguable that the type 5 noun suffixes are clitics. They don't actually modify the noun, but rather perform a syntactic purpose within the larger verb clause. The very title of the group and description in TKD imply that they are really clitics and not true affixes. None-the-less, treating them as noun suffixes that follow all the other noun suffixes makes it much easier for non-linguists and keeps the description simpler and more consistent.

If you are asking whether a linguistic description of the features of Klingon should note that these are actually clitics, then I would accept that as most likely true. If you are asking whether we should stop calling them suffixes when talking about them in the Klingonist community, then I give a very forceful, "No!"

janSIy