To claim that cladograms are based upon and confirmed by morphological features alone is to misrepresent the state of the science.
But creationists must misrepresent science as a necessity, as we are seeing.
Cladistics is nothing more than subjective classification, subjective because it's based upon the classifier's assumptions. Assumptions of evolutionary lineage, assumptions of characteristics lost or gained, seeing membership in a class defined by the classifier.
That and nothing more when all the mumbo-jumbo is stripped away.