Klefbom’s out for the season with shoulder arthritis. There’s no way the oilers can part with nurse

You had pretty much the same idea I did. I traded Nurse for Ehlers as well. In your case though, you left gaping holes on your LD. As already pointed out, Klefbom is out for the season and with Nurse gone, it doesn't leave you with much on that side. You could A: trade for a first pairing defenceman which isn't likely or B: bring your young guys up from Bakersfield and let them have a go or C: create some cap room and plug those holes through Free Agency, which is what I did. One other thing, I wouldn't throw Puljujarvi to the wolves right away on the top line but ease him along gradually by starting him on the 3rd and see how he does.