Hayden is fine. He's a warm body. It's just like bringing Fischer back. Guy with size who is trying to carve out a new role because he isn't good enough to be what he was. He doesn't even have to be mean. Just work the boards a bit and not get flattened by contact.
Pitlick is fine as a guy with size and a little skill. He's a buzzsaw and energy guy. We need more of those.
We're talking about ten minutes a game guys, and you're complaining because they aren't core players.
Fischer has spent the past two years playing a defensive role (1400 mins) against quality competition with good results. Despite that role, he has 25 ES points. Hayden has gotten on the ice for less than 900 minutes and has 9 points.
I like Pitlick as the 3RW if you move Kessel up to 2RW and shelter him with Hayton. That's... passable I guess..
But Hayden is barely qualified to be a 13F.