As already highlighted, Decoupling, if in doubt , leave alone:
If you over decouple, the board costs might go up a little, and the BOM will go up a few extra capacitors. But decoupling wont be a problem.
If you under de couple, then yo uare in for a WORLD of pain.
The board could be intermitant, could work monday and not fridays, might be just fin , mos tof th etime, but fail in a year or two, intermitantly, and a board re spin would be need to fix it, IF you could find the reason.
Its your job, but I know if its mine, what route between following and cutting back on decouplng I'd go down unless I had VERY good reasons;
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