Viz doesn't consider killing MoFo's as a joking thing....I played Hybrid for awhile and I somewhat agree that stunning and running is a cowardly strategy but in the world of UO blacksmiths, crafters, and cowards need a way to gtfo! It is also nice when you have 1 Hp left and the satisfaction of hearing the stun and knowing your escaping with your precious gear....
Uo was built around a variety of templates. Unfortunately the PvP templates have been Max/min'ed over the years to the point of breaking the system. Taking away a crafters ability to stun and flee removes the small chance they have of escaping a PvP situation in which they will definitely lose. Although only a niche of UO players are pure crafters, the game was made for them to play they're playstyle the same way the game was made to make PK's want (need?) to kill them.
Viz as a rational person, how can you implement your fix without non-PvP based templates still being able to get out of a situation they don't want to be in?