L2 seems to be one of those games, it does a bit of the M/B/A, but seems to have a lot more situations where the reason you are losing is because you are explicitly designed to NOT be able to adapt or counter to the opposing class (from my limited data).
Yeah, this is where the party balancing comes in. You can be a "dagger" party, but in reality you'd only have 2-3 daggers out of your 9-man party. With all the other characters being "supports" against different possible situations.
I think this promotes a bad culture where a player 'knows that they have lost before they begin' and can 'blame their losses on class balance' in the few situations where they could have done something due to learned helplessness.
In my experience the main "blame" always fell on OEd gear, because it usually mitigated the rng that was fairly intrinsic to each class. Skill also mitigated it, but to a lesser extent against stronger RPS classes.
When I was approaching any solo pvp fight, I'd first see their class (thanks to L2's gearing system). Then look at the player name/guild, which would give me their rough (or sometimes exact) gear power and their skill lvl. "Gear power" usually just meant the lvl of OE and the probability of them having epic gear, which wildly skewed rng in their favor.
That would usually be the levels of importance when it came to figuring out whether you had a chance in pvp. If it was some class that completely demolished yours - you'd have low chances. If it was a player from a weaker guild with weaker gear, your chances would go up quite a bit. If that player had their own high lvl of skill - it'd pretty much be a toss up with a bit high chances on their side due to class RPS.
But usually, no matter how bad it might've seemed, you'd just fight back and see what would happen. I've seen even way weaker players win against rps/guild/gear stronger players, just because they got a bit of luck on top of proper skill. Definitely wouldn't call the majority of L2 players defeatists though. Unless you were going against super OEd OP dudes with epic gear, then yeah, a bit
But since I realized I was just assuming that M/B/A balance was the norm, I had to look into L2 balancing more to see what Ashes might be inspired by. I did not like what I found.
Yeah, I hope Intrepid manage to make a well-balanced pvx scene, no matter what form it takes.