It really isn't hard to fix frontlines...

[Mawlzy]

I mean, if they make it so that only the first person that hits a player does full damage to the player, and they get 95% damage reduction against everyone else, it would likely stop the constant fishing and baiting tactics and get people to actually engage.

With everyone doing near full damage there's no way for anyone to really do anything meaningful.

Given you frequently see 8 players pounding on the same invulnerable PLD, I doubt this would help.