Upcoming changes in 3.4

[Enlial]

Quoting from here

Duel mode
It will be possible to battle 1 on 1 against each other in a public area located at the Wolves’ Den Pier. You’ll be able to request a match via a menu subcommand, and when accepted a countdown will start and the the battle will begin. We hope you can have fun with this for community events and while waiting for the Feast matches.

We already got a thread on this.

Custom Match
Two teams of 4 players will be able to engage in a custom match by having the party leader from one group request a match with the other party.

This is interesting but I cant see it being used much on any but the most active worlds with the pvp community being so fragmented. Would be awesome if the revamped wolves den could be made cross realm, somehow. Im sure there'd be all sorts of issues with that though.

Spectator Mode
This mode is to allow players the ability to spectate matches. You would be able to spectate from a viewpoint of the player engaging in the match. This feature has been developed so it can be used for official use, so there may be parts that may be difficult to control at the beginning, but is planned to be updated, so please give it a try!

Super hyped for this! Even if its not perfect, sounds awesome.

These next two aren't PvP specific but are relevant

Auto-attack System Changes
Currently when playing as a melee DPS, auto-attacks are executed while standing within 3m and facing within 90 degrees of your target. Since it’s easy for gaps to develop in DPS values because of this, we will be changing the way this functions so that auto-attack are executed for the range requirement only. The angle requirement will be removed and you will be able to execute auto-attacks regardless of where you’re facing.

I'm not really sure about this one, I suppose it makes not using lock on target more viable.

Changes to Face Targeting System
The face target feature will become inaccessible while moving. This is in order to remove difference between different platforms. For casters, if the enemy moves your character will face the direction of the target’s current position. However, in situations where you need to face away from the target, players will not be able to simply turn around due to the auto-attack changes, therefore, you would either need to sheathe your weapon, or cancel targeting.

The change for casters is overdue. Completely silly to have to mash face target while casting. And no more moonwalking I guess? I wonder if this means that casters will auto turn while under bind.