I think Lexus just needs to get one thing right: make sure the transmission and ECU knows what the driver wants. I recall your frustrations with the V35 has always been that the software is confused about how much boost you request and thus sometimes it's unresponsive while sometimes it's violent and jerky. RX owners don't care about speed but drivability since the 2GR was the golden standard for daily drivability for a NA engine. A car with good drivability also happens to be both fast and smooth, because it doesn't get confused about what the owner wants with throttle input. A frustrated driving experience always comes from a disconnect between driver's mind and vehicle's behavior.
so far i have seen Tundra reports that say there is lag and there are reports that say engine is very responsive.... With NX, there were reports how turbo feels faster than it is, and reports that it is not responsive enough.
I think at this point, people are just better of with 450+ version due to extra 100 hp electric power at any time. It is best of both worlds, and yes, faster cars have always been expensive - so it is expensive.
People today want hybrids/phevs to be:
a. same price
b. faster
c. more frugal
Two of those will work, three never.