Concerns about balancing classes around groups of 8
Let's say I am a mage, and my class in the rock paper scissor system will be beaten by rogue, but can kite out warriors. If I run into a Rogue in PvP, the only motivation I have to fight back is that I lose less XP if I hit him. So, I just hit him once, then stand still because he beats my class.
That is the most boring game I can even think about, please let skilled players win against their class counters, one of the most satisfying feelings is when you beat an opponent by 10 health. Why even fight if you have no chance to win? do not let rock paper scissors be absolute, make it difficult to win against your counter, but achievable, and don't let group balance ruin 1v1 fights, which is probably some of the most fun types of PvP, I absolutely love to walk to the gates of towns and see the best players dueling there, it's awesome and you start to recognize the names of the best players.
I am just mainly afraid that if the game is balanced for group content, this specifically leaves certain classes vulnerable and others just straight up better at dueling. My main concerns are healers, as I have yet to find any MMO balance healers properly for PvP, they either outheal damage, or they do not, I would love to see healers able to defend themselves, but not be invulnerable to damage.
Additionally, tanks in PvP have always been in a really bad place, unless they offer CC and other utility, why even bring one? they are generally either invulnerable but have no kill potential, or outclassed by DPS entirely.