I think you missed the #1 or #2 issue which is bad saddle tank design leading to fuel starvation! Most of the other issues you listed are far behind this and need for oil cooler. This is unforgivable for $40K+ Nismo.
As for your #3 - adjustable upper control arms, I think it's common for this to be aftermarket mod - even for Lotus. I'd estimate that <20% of Nismo owners regularly track theirs (a good poll question), and it just doesn't make sense for Nissan (or any other manufacturer) to include them. And even if they did, they wouldn't be as good as SPL.
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