I don't really like the idea of trading out Kempny, who's essentially the backbone of the defensive corps. I'm not sold on Djoos on the top pairing, mainly because I don't know if last season's performance for him was an aberration and he's better than he showed last season. Also, I think Carlson plays better with a more steady, stay at home partner.

There is no way the Caps trade Kempny at this stage. Maybe, MAYBE in 2-3 years. But the Caps cannot afford to lose a defenseman.
Unfortunately, the Caps will probably have to send players down and hope they clear waivers (if they can afford them...)