This is a good idea. As much as I love the new Modern design, there are times that the next episode is selected in error. Don’t know how that happens, but it does, maybe because I accidentally started the next episode and didn’t reset it as unwatched? So, having a visual of < PLAY > could solve this for some like me without having to revert to the Classic layout.
Even better, the < and > could only show up when there is indeed only a previous or next episode available. Sort of like my mail inbox, I have set SPAM to only show up when there is spam, otherwise it doesn’t show.
While I’m on the topic of the Infuse buttons, I think the “Mark As Watched” could be minimized to just read “Watched” and “Unwatched”. The less words on buttons is better.