The new "New Premieres" row is great but it would be even better if there was an advanced option to tick a box that "hid" Premieres from the "Next Up TV" row.
In other words, "Next Up TV" would then only contain episodes from seasons that you were already watching while "New Premieres" would include all the shows that were ready for you to watch a new season. This would mean that "Next Up TV" was less cluttered and only showed Next Up episodes in your current season.
Hope that makes sense.