So about Balance.

[Fannah]

1v1 [...] Person who spam more buttons usually win there.

I have to disagree. When you kill someone as any DPS and it remains more than 50% of your life, it's far to be a who spam more buttons. When a player wins 90+% of his duels, there is another reason than spaming more buttons. There is indeed less knowledge when it comes to the new PvP comparing to the PvE, but if you don't think about it at all because you're thinking how easy it is, you will just suck and lose if you're opponent is not in the same mindset as you.

Just play dark knight and you would win anybody 1v1.

Depends on the kind of field. If there is a ring out kind of mechanic, the machinist have chances to win by KO -> he can use the border to afraid the DRK, as it'll be his defensive tool. And if the DRK doesn't pay attention, it's an easy ring out when the machinist knows how to play with position delay.
But yes, overall, the DRK is too powerful 1v1. Thx it's not actually a real problem in the content that matter. It even makes him a powerful solo guardian of base in the Frontline, but often, it's a given role to the DPS -> the worse defenser x) (in a way it's a good trap if you are a great duelist).

Too many people complain about how the new PvP is simple, but so few actually even tried to understand it. They think training on a dummy 5 minutes and doing some pvp maps are enough. It's not a dungeon, they are against people who will adapt.