An RX, with it's rotary engine, will SUCK as a 4-speed. The engines have no torque, so very little power low down. If anything, to make a RX drift better, you need to shorten the gearing and shift lots to keep the revs in the power band.
The idea being, you drop into the corner in the right gear and upshift once or twice on the exit. The short gears make it easier to spin the next gear up.
Timing your upshifts and downshifts is part of the fun of drifting
I agree with everything said here especially the last part.
You don`t like a 6 speed. Then you won`t like the lexus IS F it has an 8 Speed. I have one with full RM done and it is sweet.
Ahhh... no fooking wonder Twinturbo was in 4th and 6th on the last corners at Indy!