Conclusion: Buff heroes, nerf peasants.
Not really. Just remove limitations so that everyone can play according to their skill levels. Also biggest nerf to teamwork is early active attack, more than it was nerf for "heroes". Now, many people are afraid to attack the enemy, scared of unintentional team hits. Also most weapons (even one handed weapons) get stuck on friendly player standing beside you. I'm not saying that early active attack is bad, it's realistic and makes perfect sense. However, if their goal was to nerf heroes, I must say they kinda failed with that.
Everything should be buffed, something more, something less. Maybe even higher levels for everyone (but time required to earn them should stay the same or even greatly reduced and with real cap for everyone and certain interesting bonuses for those who have more XP than needed) or same levels but with changed skills system so we gain more skill points per level. Currently, converting skill points is in many cases better choice than spending them. Maybe they should try with that, to buff skill points. That way, certain extreme build which are problematic will become thing of the past because people will be given an incentive to use skill points rather than convert them.