On the other hand for equal combatants it's easier now to block. In DH, RT, DW. If someone dumped at you 4 atack you could dodge max 2 from his 4 and you would be dead. Now you can negate all his attacks.
Now some math.
Let's say Both guys have 50 ws. Both are unaligned.
Bob have 2 mc power sword he have ambidextrous, blade dancer, SA, LA, two wp. wielder = 2750 xp he can make 2 LA with 50 WS (no penalty from 2 wp wielding, mc negate -10 penalty from LA), he can parry with ws 50+10 balanced+10 mc sword = 70
Jake have MC power sword and MC shield he have SA, step aside and parry +20 for 2300 xp, he can parry with shield with massive WS 50+20 (from skill) + 25 ffrom shield = 95, he can attack with aimed SA 50 WS+10 (aim)+10 MC =70
So after spending massive exp you have great kiling machine but in fight with someone with good def he can be easily beaten.