My issue with the war of the roses combat system was that every two to three hits will crush through blocks, and with the basic swords, you can only get through heavily armoured players with stabs. Even then, the stabs don't appear to actually interupt the swings, even when doing damage, so it turns in to a more armour and heavier weapon = win game. The health system is also silly. Also, I can never get less than 100 ping to a war of the roses server, even though I can manage to get 40 ping to warband servers.
Edit: A few of the combat mechanics seem poorly thought out as well. I noticed some of the thrusting 2handers have no stun if you manage to block them, unlike warband. This has the consequence of allowing someone to continually thrust at you without you having the ability to counter.