Now that you mention this it would actually make a great deal of sense. Sabotenders were, I believe, supposed to be the slightly more realistic version of cactuars in this setting as they were in FFXI as well. I would not be surprised at all, however, if we discovered cactuars to be their own independent species in the expansion. They could easily fill the same role as moogles in terms of comic relief.

A Jumbo Cactuar primal is a likely possibility for the expansion I think.