The movement impairment caused by spear hits was one of the few things which made the Hoplite worth playing. Furthermore, in my perception, it was a nice gimmick to add to the diversity of combat.
Now, with the "tweaked" sweetspots of the pole stab i glance all the time in situations i would never glance before. Add to that the hightened difficulty of kicks, the fact that shields can take way less hits than before, and this stagger remove ( note that is was only movement that was stopped, you could still block perfectly well ), and you realize that hopliting has been "tweaked" to uselessness- All with one patch.
Needless to say, that this was not needed at all, the few guys that bother with the tedious one-directional gameplay did not need more frustration added - We are only a handful and now i fear that more people will drop it.
As to the OP: I would revert the stagger changes for pole / shield mode so that a spearman has an actual role on the battlefield.