Can I control the amp block parameters like the boost switch, Eq, or drive parameter w/ MIDI CCs?
Yes, you can control the drive parameter in the effects block. No, you can not control the boost switch or EQ settings. The solution for the boost switch is to use the filter block and set the type to NULL. The filter block has a gain range of -20 to +20dB expressely so that you can use it as a gain control into the amp block. The boost switch adds +12db of gain, set the filter level to +12db to match.