Stacking bleed would imperil the niche they want to give daggers. This one recalls when Gray One and Incarmine weapons applied regular bleed rather than the silly little non stacker we have now.
On the other hand, Sunder is worth the effort, very often, as it contributes to damage very quickly and very directly. Lower raw damage against a sundered enemy catches up very quickly.
Crippled has uses, but mostly in PvP niches.
So many others seem like they would be good, but just don’t break their way into relevance.
But we must speak quietly of such matters, lest someone with more zeal than comprehension decide that all damage needs to be reduced until a single stack of a paltry dot be considered impactful.