Well, If Yoshi said Healers are there to Heal there's only 1 solution they could do without changing any of the classes or removing anything and its to make monster hit EVERYONE hard so a healer is constantly healing to keep the party alive and cant even get the time to consider throwing in a debuff or damaging spell anywhere, The only problem is then is everyone will complain and cry "It's too hard waah waahh", Sadly the poor devs are stuck in a hard place with a bunch of ungrateful spoilt and self entitled players that they cannot win with any decision they make.