I think Lexus should have made three variants of the current LS, one called the LS 350tt (416hp) and a second variant with the 5.0L 2UR-GSE V8 (472hp) and call it a true LS 500...that would bring back buyers and of course the LS 500h (354hp).
I agree. I don't think it was all doom and gloom and Lexus made a huge miscalculation here by getting rid of desirable powertrains. Toyota/Lexus getting rid of the V6 in favor of a 4-cylinder in cars like the Highlander and RX is a huge mistake IMHO. People still want big powertrains with decent fuel efficiency.
BMW is doing an excellent job at it. Learn from them.