Thoughts on class changes?

[Yeol]

Of course the standard comp SE is trying to enforce is 2 melee, 1 ranged, 1 caster.

This is actually not true. You can check the details of Raid finder party composition

When queuing solo or with less than a full party, the Raid finder will match together 2 tanks, 2 healers, 1 ranged physical DPS, 1 ranged magical DPS, 1 melee DPS, and 1 other DPS. The fourth, unspecified DPS class or job to be matched will depend on the settings selected when registering for a raid.

When selecting Duty Completion, the unspecified DPS player cannot be the same class or job as other players to be matched together in a party.

When selecting Practice, the unspecified DPS player can be the same class or job as other players to be matched together in a party.

Please note that the above composition requirements are not imposed upon preformed parties.