That's a pretty small sample size Bleach, Horvat is having a great season offensively dragging around replacement level junk and on a ~70 point pace.
Eriksson is working hard, does the little things well but is a complete black hole offensively, Rousell has outplayed him for sure and his underlying numbers with Horvat have been fantastic this year. Ideally neither of them play with Horvat as I'm trying to see if Baertschi and Virtanen work out with him as a 2nd line.
Eriksson should be stapled to a checking line and 70% defensive zone starts with Sutter or Beagle obviously he's nowhere near worth his contract but in a role like that he's at least effective and freeing up offensive usage for Pettersson and Horvat's lines.
One of the reasons I think Horvat has suffered a revolving door of wingers is because none have distinguished themselves for the spot. Even Roussel has apparent limitations. They will see him move down when Baertschi returns. Virtanen got a look and was then moved off for Eriksson. This change matters. It let's us know that despite his lack of speed, he's still seen as a player that can be effective 2ways near the top of the line-up.
Virtanen, Roussel and Eriksson are all hovering around the same PPG pace. Let's not overlook this when condemning one player of the lot while promoting another (Virtanen in your scenario), for the aesthetic of speed and random shot selection.
I say give LE a run and if he bombs, then demote him. Really, this should be the mantra for any winger not named Boeser.