On Vrana, I have to ask if ice time was the overwhelming factor in his improved production in Detroit, or whether Vrana was more likely inspired to perform better, like with a chip on his shoulder, after leaving the Caps, or whatever else.
Inevitably, ice time did factor in, but does that mostly account for the run he had in Detroit? I really think it's yet to be shown.
To me, the other interesting question is if I assume that Vrana was simply more motivated to play in Detroit for whatever reason, he enjoyed the added responsibility or enjoyed being able to restart anew away from coaches he doesn't like, etc, then the next question is about whether there was anything else behind that motivation. If, for example, I also assume his newfound motivation was really inspired by finding a new team outside of Detroit this summer as much as it was about leaving Washington, then I have to wonder whether re-signing him here will mean he ends up playing for Detroit like he played for Washington.
The flip side to it is Mantha also upped his game after the trade... Maybe Vrana and Mantha both end up backsliding into their old ways no matter what because that's just the kind of players they are. Time will tell.