Actually I was thinking about it and came up with few ideas so if its not prohibited maybe I'll share some of the ideas.
I won't talk about frenzy and enraged because it is as it is and so many people mentioned it so i don't have to but there is one more thing that came to my mind and it is:
Rressistances - the values of them are to high maybe if t1 would give like 2% and not 8% as it is now and t2 4%...etc it would be more balanced. Also in my opinion there should not be an option for maxing it to 100% but maybe like 50% should be max for each ressistance so that even when you cap all of them to 50% you could get damaged.
Why? Simple you can get 2 ressistance to max 100% and one that is almost 60% at current level of tiering.
So example you can have 100% fire res, 100% magic res, and like 60% of ice resistance with that mage class at that moment are usless in pvp:
Fireball, Firebalt, fire ward = 0 dmg ,
Staff, Magic missile = 0 dmg
Ice magic is cut more than half so all that left is for mage its poison and teutonic outburst with that you wont even scratch anyone and with mentioned frenzy and crit builds of warriors they can one shot even somebody with higher armor and 2300 hp.
That's all for now I would be very happy if all of you could share your opinion and specialy devs what do you think about it?