eARC when using Roku

I have a Lyngdorf mp 60 2.1 that is currently connected to a Roku ultra via HDMI for both audio and video.  Is there any advantage connecting The Roku directly to the tv, a LG 2.1 hdmi, via HDMI and running the audio back to the Lyngdorf  from the tv using the eARC HDMI of the LG tv. Since the video from the Roku is not processed and is only passed  through, by the Lyngdorf a direct connection to the tv for video maybe better?   Please advise. Thanks.

Guy