Probably not the best trade for Philly. Forever injured Fabbri holds zero value to them. Zadina is what he is. unless he has a huge season can't see a re-building Flyers team not getting back more for, one your line up, a 1st line winger.

If Zadina has a good year and Fabbri comes back strong I could see Philly trying this, but as of now they don’t even entertain the thought.

I don't see this happening and if it did Konecny wouldn't be on the top line he'd more than likely be on the 3rd line.

Kase - I doubt SY would bring in an extra 4th line winger with the players available in AHL fighting to make the team (Soderblom, Berggren, Hanas). But maybe, to keep the roster competitive and if Pius Suter and Erne moves on too.
Gavrikov - Assuming Olli Matta doesn't extend his contract, there is also Albert Johansson who is looking good. If anything on the D-line, a right handed RD is needed.

About the trade otherwise - Agree with both previous comments.

Also - Doubtful the first line would be changed. Last season they had great chemistry and assuming Lalonde's influence doesn't change that, I don't see the first line changing anytime soon. Possibly if Bert moves on a slot will open up.

Kasper is a maybe. He's been looking good this season in the SHL thus far. He will likely get a year in the AHL before stepping into the NHL.

I don't want Glass Kase.