[BACKCHECK!!!]

Lets do a thought experiment:

Lets assume just for a second that Hartley doesn hate Sven, that he doesn't want to sabotage the Flames, and that there actually is some technical/tactical aspect of Sven's game which Hartley thinks is/was not improving and could be addressed partially by having Sven watch someone else play on his line without him.

Now consider the following facts:
After being scratched, Sven gets put right back on his line (with skilled linemates).
He is getting the same amount of ice time as Monahan, 10-15 mins per game.
He is being trusted on the ice in the dying seconds of 1 goal games.
He is getting slightly sheltered situations and opponents, and favorable zone starts.
He is not getting killed, and is producing about half a point per game.

Remind me again what the problem is?

He's playing, he's getting plenty of sheltered ice time with skilled line mates, and he's producing we'll for a rookie. Even if you do assume that Hartley is scratching Sven for absolutely no reason, I'd say he's still better off playing 14 minutes per night as a productive player in the Big Leage and missing a game every two weeks, rather than spend the season riding the bus with the farm team.

If you do give Hartley the benefit of the doubt, then Sven is being handled basically perfectly. I'd like to see him get a bit more special teams time as the season progresses (including PK, because I think you should have the option of using your stars to kill key penalties), but there's still plenty of time for that.