What's the specific complaint about? The overall distribution of earrings by job? Or is there anything in there about the +2 drop rate in general?
There isn't really a complaint here. It's clearly written in a way that expresses support for the team and love for XI. It's moreso laying out drop rates from their sample and asking for clarifications on why drop rates tend to skew toward the base 6 jobs. Also asking if they're considering adjusting the drop rates by job to make for a more balanced gameplay experience for all jobs. (Tbh I feel like the "balanced gameplay experience" could have been explained a bit better, but that's just splitting hairs...)
Yes there is a note specifically about the +2 earring rate as earned from +1 boxes:
ジョブの分布率や入手率の違いを考慮した上で、+1のケースや+2のイヤリングの入手率を改善することは考慮されているでしょうか。
"Given the differences in earring distribution among jobs and acquisition rates, are there any plans to adjust the acquisition rate of +2 earrings and/or +1 boxes?"
The skew towards the base 6 jobs is pretty hard to argue against, but a sample size of only ~1k +1 boxes still leaves plenty of room for variation (consider the movement of BRD and COR between normal and +1 boxes). DRK is definitely getting boned though lmao.