The problem is that nobody ever earns their clear for these. That's why you see a jump from 1% completion to 3% once players can outgear it, and to 10% once they can unsync it. If SE was being savage content, savage content would be locked to a gear and item level cap so that it can be done at the standard 15% below maximum DPS contributed player DPS that Yoshi-P designs it for. If you want a slightly faster clear, then die less and let the healers and tanks add some DPS to it. Those extra 10 seconds woo s/.
First, that is exactly what the Raiders do when they demand PUG's play like them and do big pulls. Second, the developers need to let PS4 players play the content, and thus "PC master race" players with whatever else the PC creates an advantage for is not what they will ever tune it for.
If they designed a fight that could only be won by using every dirty trick available to the PC, there would be a worldwide 0% clear rate, there are conditions that could be made where only someone with a $10,000 PC, and the reflexes of a 16 year old could ever win the content. That's why fights are tuned to even less than PS4 levels. The game still needs to be playable on a potato laptop.
There is no "this is perfect for all raiders" level of difficulty. There is "10% of players can clear this", there is "1% of players can clear this", and then there is "only 2 people will clear this." Floor 200 of PotD Solo is the latter. No matter what level it's tuned to, someone will think it's not hard enough and still complain.