Heilstos your level of misunderstanding is so large I am beginning to suspect it is because of my bad English, and I will apologize for it. I will try once more.
No. I don't know what part of "We don't care that AST DPS was nerfed~it was the right thing to do" was ambiguous, but I will say it again. The job was too powerful, it needed a DPS nerf. If they nerfed Malefic 4 by 10 potency I have zero issues whatsoever.
I feel the fundamental misconception in your argument is your assumption that pre 5.3 SD was universally a stress factor. It may have been for you, but it was certainly not for people that can press buttons. If you feel that this change is somehow positive in optimization context, you are forcing me to assume you have never optimized anything in this game (I am not implying that this is bad, I am pointing to this as a potential reason why I'm not coming through to you).
Here is a translated sample of optimized P2 opener for E8 that we came up with, where we spreaded every job's potency timeline so every card played returned maximum expected potency. It may be hard for you to understand, but we ENJOYED spending time thinking about what's best, and felt rewarded by the material gains we saw from correctly executing this. For people like us it was NEVER a stress factor, and most contrary to a deterrent; this was exactly the fun factor of this iteration of the job, that made us feel it was worth playing. New SD has dumbed this down into nothing, and we now have half a job to play with. ←THIS IS OUR PROBLEM WITH NEW SD
What we suggested for players like you that found old SD difficlut/stressful to manage was to give them the option to randomly autoplay the cards drawn. As far as I'm concerned, I'm fine if randomplay mode guaranteed three seals. That way people like you don't have to press buttons, and people like us that care to optimize for increasing 1% expected damage can go on theorycrafting on an interesting mechanic, and we thought this is the best for both worlds.