I'm not sure about that next season, Pitlick is what he is, a fast high energy player with below average puck skills and offensive instincts. He's coming off one of his two good seasons (with 2017-18), will be 29 and is injury prone.
If the Flyers didn't have great young forward depth, he'd be a good signing, but I'm not sold that he's better than the alternatives. Sandin is a late bloomer who brings similar qualities (high motor, intense forechecker) and potentially better offensive skills, and after 100 SHL games, doubtful he's coming over to play in the AHL at 24. NAK does everything Pitlick does but better. And Pitlick is a RW only, so he doesn't provide flexibility. Laczynski is a 4 yr college senior who is on the cusp of being a NHL player and can play center as well as RW.
If the Flyers want a veteran bottom six forward to go with Raffl, they should be looking for an upgrade over Pitlick, Thompson or Grant, ideally a veteran on a one year deal who plays center and RW and can be picked up at a reasonable price.