The first fix that has to happen is DPS Job Roles. You can't have a "Caster" that has 80% of its spells free moving insta-cast along with 3% Raid DPS buff and doing more DPS than the "Support" that has zero Raid DPS buffs.

In the short term, MCH abilities need a buff to bring it up to a rewarding level. In the long term they need to sit down and rethink the battle system because its current design isn't working anymore.