From my testing on the Lyra average fps is around 45fps. But Hispoot who made the cfw has released another LCD driver that should improve refresh rate i have yet to test it.
new screen driver for testing.
It uses rgb565 mode by default, instead of rgb666 mode, and can use 3bit mode by passing p_3bit_mode=1 p_dither=1 or p_3bit_mode=1 p_dither=0
If you want high refresh rate, you can try 3bit mode.