I'm not an audio guru but I can tell that you need a means of setting the quiescent current in each power transistor. You can change the two series diodes in the bias network to a "boosted diode" configuration. You then adjust the boosted diode to set the standing current in each leg so it operates in class AB. This avoids crossover distortion.
Also, there is no protection against thermal runaway. You need to thermally couple the boosted diode to the power device.
You also have no high frequency roll off on the op-amps.