With all this in mind, I doubt you can call this brain dead. When I mained BLM, the most complicated part of the rotation was knowing when to move and saving instant casts for that. For BLM you do have some things to pay attention to, enochan, thunder, polyglot stacks, but ultimately your rotation doesn't rely on setting up your burst window, at least from my lvl 80 knowledge. Your main concern is to use procs and xeno for moving, knowing when to move, and spamming f4. Things do get more complicated with BLM once you start doing no b3/b4 rotations with transpose for optimal AF uptime, but iirc the dps gain from those were not worth doing as regular rotations and were even referred to as meme rotations.

So with all this in mind, yes RPR does have a bit of tuning to do, but it shouldn't be regarded as a utility job and nerfed to the ground. Arcane crest could be argued more helpful than anything SAM or BLM have due to the heal. Arcane circle, though it does have a little raid utility, is largely used in a greedy fashion, you could take away the damage buff and it wouldn't bother us. But with this said, because a DPS has actually raid utility does not mean that they shouldn't be able to pull high DPS, I find the idea of this reductionist.

I want to also remind people that RPR is a new melee dps, and a LOT of people changed to RPR. We are seeing an oversaturation of RPRs, especially in higher dps, precisely because skilled players are playing RPR. This doesn't mean RPR is completely fine, or that samurai is being underperformed by less skilled players, but it speaks for itself if some jobs outshine RPR in certain fights. If you actually look at the MAX percentile, DRG outperforms SAM, so do we now nerf DRG? MNK outperforms RPR, so.... nerf everything if it out DPS SAM? I think there's more here than people are actually seeing.