The D should be better although like the previous year when we got Chia, I can't say I know much about Edmondson. The problem seems to be we have 2 very solid top 3 D's and then a bunch of bottom pairing D's (outside of the rookie wild card) as I would think the rest of the bunch not counting Romanov would be on the 3rd pairing of most contenders give or take a few teams.
We clearly have a massive hole at 1 LD, Romanov shouldn't be asked to fill it, Chia doesn't seem that good of a long term fit from what i've seen but can fill in there and Mete needs a lot more offense if he were to play there.
That said I just don't see the Habs rolling with this team as is, even if you send Weal to Laval for Evans, this team is way too up against it for the cap and that's with just 21 players which no way will that last. I think one of Mete/Kulak gets traded at some point as with Chia/Edmundson joining Weber/Petry, that's 5 plus Romanov assuming he stays up all year. They need to figure something out on Juulsen so they can wait till the end of camp and see how he looks and then decide what to do, if Juulsen looks sharp maybe he stays, or if he's good enough maybe they carry 8 D, if not maybe they try to get something for him and if all else fails then just send him to Laval.
But they will need cap space at some point so they will need to think of something imo.
