Yes, melee characters generally take more damage than ranged characters. That's to be expected. The ranged characters still have to rest at the same time as the melee characters. It's a symbiotic relationship where the ranged characters depend on the melee characters to keep them out of harm's way. Your "three weaknesses" don't mean that you can just build an all-ranged party and pwn everything with 720 noscope. They'd get trashed. If you're in a fight with heavy AoE(Crystal Eaters, for instance), you need to approach that situation with a different tactic than if you're fighting the ogre and bears. It does not mean that the devs should buff melee characters. To me, it sounds like you just want one tactics to work in every situation.