I will preface this with saying I only use dual-wield I have used two-hander as well. However, I have a tendency to try and avoid the meta. Yes that is my fault I do understand this.
HOWEVER, when you look at the actual numbers and the actual passives granted there is really no argument to be made that 2H in PVP is far superior... and no not because of Dizzying Swing that is only a part of the problem.
The passives alone from the 2H tree allow the player to leverage the HUGE stamina regen increase.
- 10% from Rally
- 30% from striking a killing blow using a 2H
- If they also have major endurance (from a potion or skill) it pushes their regen to 60%; see DK GDB ability lol).
Now what this does coupled with a cheaper execute is pretty much enable them to forgo any worry about regen on gear. This is why most players are running all infused jewelry with weapon damage glyphs, pairing it with high weapon damage sets. Average health pool is around 20-25k in BGs, average Dizzying hits for 3-5k (on me at least with high armor and applying minor maim always), you can do the math of how many attacks it would take before they are in execute range (aka most likely going to lose the fight).
Now to the other aspect:
- 2H execute is far cheaper than Whirling Blades and hits harder on a single target
- 2H spammable hits harder and has CC
- 2H has the best emergency stamina heal in the game
- 2H Ultimate is one of the best ultimates in PVP. Dual Wield ult is an absolute joke... and curable,
Now this is not asking for 2h to be nerfed. Instead buff up dual-wield.
- Flurry (all versions): Inflicts 50% of the total damage caused by this ability as incurable bleed damage over 4 seconds.
- Whirlwind: If you kill a target with the ability you restore 75% of the ability cost over 10 seconds.
- Rend: Increase range to 10x10, lower bleed time to 12 seconds keep damage the same. IE instead of 50,000 over 16 seconds, 50,000 over 12 seconds.
- Thrive in Chaos: Increase range to 12m cone, lower bleed time to 6 seconds keep damage the same. IE instead of 27,000 over 8 seconds, 27,000 over 6 seconds.