Why are Jakob Pelletier and Andrei Kuzmenko not yet with the Philadelphia Flyers?

On Monday, at the Utah Olympic Oval just outside of Salt Lake City, Philadelphia Flyers forward Garnet Hathaway lamented the weirdness of the team's current predicament: his team had made a trade bringing two new players into the fold, but he had yet to personally lay eyes on them -- even days later.
"They’re not here yet, so you a little feel empty," Hathaway said after the day's practice. "You lost two guys, and we don’t see the other side of that trade yet."
A day later, and Jakob Pelletier and Andrei Kuzmenko are still yet to arrive.
It's undeniably an odd situation, given the fact that the trade which sent Joel Farabee and Morgan Frost to Calgary -- and, at least on paper, made Pelletie...