First and foremost, these insults against whores needs to stop! It should be agi-politicians not agi-whores, whores actually do something when paid!
#1
Make daggers similar to bastard sword/longsword etc.
Heavy penalties with shield...
I hope it's possible to "extract" that penalty that makes BS/LS/HBS etc. very poor in shield mode without making daggers use 2h animation.
That's my first idea about how to fix dagger/knife + shield trolling.
I've played a full gen on an alt 3/33 rondel+shield(full title: Shieldcrutching rondelspamming agi-politician, now I got a 18/24 dagger/knife man to practice chambering so I got some first hand experience.
#2
If that's not possible, why not add secondary mode for daggers with 10-20 less speed and +2 dmg, and the other mode same speed as now but -4 dmg. You need pressure to penetrate armour! Pressure=more momentum=more risk of ending up in poor position=lowering weapon speed easiest way to simulate this imo.
#3
Third and final idea: tweak athletics!
To solve rondel(dagger) issue, nerfing dmg isn't the way to go...
Two ways to nerf/rebalance athletics:
Easy(heavy handed way) make athletics similar to horse archery, 6 agi per max unlockable athletics point.
The harder way:
Raise base mobility to 9 agi/3 ath level and half the mobility bonus from agi/ath. This way 18 agi/6ath is almost untouched, while 36agi/12 ath becomes similar to what 27agi/9ath is now. This is of course a major buff(rebalance after wpf patch) to str builds... which might make it a bit too extreme...
edit1: typos correction 1