I don't see why a Ranged can't carry a bad melee, having a cast time doesn't automatically make them bad at carrying (especially with the interrupt change). Effective use of CC and keeping their team apart can change the flow of battle just as drastically as raw damage, given a BLMs power to pump out Fire IVs and IIIs and a MCH utility belt with their fast burst with procs/wildfire, it's not hard to see why either class can't do both. You can even throw SMN in there with the mass DoTs putting on healer pressure.

Also, for all intents and purposes, saying a Melee's LB has a better carry rate in the current state of feast you might as well admit it is a push to win button on anyone with a medal stacks (which is just a flaw of how the mode work). If they null the medal effect on LBs and/or reduced the dmg, then that argument flies out the window as quickly as it came.