If this crash was indeed caused by the landing itself rather than a pre-landing emergency then surely it is high time this aircraft's air worthiness certificate was withdrawn.
Note the word is
AIRworthiness
The standards for rough handling have to end somewhere. Beyond that you take your chances in the outcome.
It's impossible to define all outcomes of a mishandled landing, thus you can not regulate a sucessful outcome. What you do is regulate some capability. Exactly where this plane stands relative to the regulation of abusive use is unknown to me. Thus I can't form an opinion of what certificate is at risk (design, operation, pilot training etc.)