you must have mis-read much of what Rein-Yagami has said. your response suggests a rather low level of intelligence.
also you can draw/sheathe your weapon with L1+R1.
and as per update 2.1...
The following changes have been made to gamepad/controller controls:
You can now scroll through the enmity list using LB/L1 + up/down on the direction buttons.
You can now scroll through the alliance list using LB/L1 + right/left on the direction buttons.
but even still... the L2/R2 buttons are by far the most used on any traditional/default configuration.