Current state of KMST JOB Balance

Explain that to me. I can't see how a 6:4 ratio benefits me, unless it no longer matters how little damage I deal with.

The current system rewards EXP by how much damage you do. The more damage you do, the more EXP you receive. EXP gain is mostly personal and the damage your party members do have little impact on your EXP gain.

If I understand the new system correctly, how much damage you do has no bearing on how much EXP you receive. Everyone will receive equal experience, so the weaker party members will benefit from this the most.