The new consoles will use an RDNA2 GPU

While possible, it hasn't been confirmed anywhere. People are assuming it's gonna be a revision of RDNA because the consoles will include ray-tracing hardware. And while possible, it's not necessary to change the GPU architecture to add it, ray-tracing hardware can just be an extra module on the SoC, like audio processing units are.

It is an architectural upgrade to the current RDNA which AMD already confirmed has higher Instructions Per Cycle (IPC) than RDNA, but haven't disclosed how big the uplift is.

It's a minor tweak. We've all seen this before. Just like all the GCN revision that brought 3% better performance clock-for-clock.

I'm genuinely convinced you never seen hardware and console releases before and this is your first time around.

TSMC's 7nm+ node (...) which allows for either higher...

Yep, you definitely learned nothing from Intel's 14+++ marketing schemes.

Even at the absolute most conservative estimate if AMD were only able to get a meager 10% IPC uplift from the RDNA 2

Absolutely hilarious how cluelessly optimistic you are. Again, you very clearly weren't around in the GCN days, nor in the Polaris days.

with a 15% reduction in power consumption from TSMC's 7nm+ process at the same clock speeds

And it gets even funnier.

Your whole argument regarding the GPU and its performance falls apart once you do some research.

You're the guy who, on another thread, tried to direct link me to images hosted on a review that disprove what you were trying to say. I don't trust your ability to "do some research" when you don't even read your own sources.