(H) What is this server's class imbalance?

Looking to transfer servers.

Is there a need for Holy Priests?

Class imbalance? Likely the same as most servers.

Shortage of tanks for 5’s and 10’s. Not enough raid spots for tanks, but everyone wants melee DPS if they’re willing to do that.

Healers are always in demand, including H Priests. The demand isn’t as high as it was “back in the day”, but all the main raiding guilds are typically looking to add a healer or two.