Not really. Among their 6 best forwards they've lost only 15 of 180 man games so far, 12 of which are from Eriksson alone. Boeser, Horvat, Baertschi, and the Sedins have missed 3 games between them.
They've been hit a bit harder on defense, but it's nothing that doesn't happen every single year. I'm not sure Stecher's 15 minutes and Gudbranson's 17 minutes have been all that hard to replace. Edler and Tanev's absences have been more impactful, but again, this is something that happens every season.
Anyway, this injury sucks for Baertschi, but he really wasn't doing a whole lot once he wasn't playing with Boeser and Horvat. He has 1 point and 9 shots in his last 8 games.