I don't think his position would essentially be abandoned, Fox's offense isn't much worse than DeAngelo's and Fox is a better defensive player on top of that, so I think he'd be good on the first powerplay, or if you want the powerplay to run through any of our forwards who would be capable of doing that you can just stick Trouba on the point and let him be a guy that just shoots and shoots and shoots. The potential upshot with his replacement would be getting another player that can actually play defense because there aren't that many on this team as it is, be it forward or defenseman
I'd personally wait until after the expansion draft to go trade hunting to fill the holes on the team and I'd give DeAngelo and Strome (yuck) 2 year deals and only do a trade that's bigger than moving depth pieces around that falls into our laps if it just makes too much sense not to