I assume that your “amplifier’ is an A/V receiver. The A/V unit will have more control options and audio processing, such as equalizers and different surround modes, than AMP, but you may not be using these. As a trial, move all of your sources to the TV and run audio back to the A/V receiver using an optical cable. Disable all of the fancy options that the A/V unit might provide, configure the unit to not use the center speaker, use Dolby audio (Not DTS), then decide if this is a good approach for you. ARC supports some features, such as tone controls and dialog enhancement, but it does not include all of the “buttons” that are typical of traditional A/V units. Love or hate of the “buttons” is a personal thing. Dolby Vision is not supported.