Farabee was 12th in pp/60 (4th in goals/60) in the NHL at 5x5 bouncing around lines, he's already an elite scorer at 20 years old, and he's still filling out.
He can play both wings, has a high Hockey IQ, a great shot, and has a lot of upside left.
He's also a solid PK forward.
Seriously, I'm not trading him for Eichel straight up, Eichel is what he is, a very good but not elite scorer (he plays a lot of minutes and plays a lot of "garbage" minutes. Stat padder).
Last three years, he's 57th in pp/60 (5x5), behind Giroux and JVR. 107th in goals/60. 115th in xGF/60. 105th in xGF%.
On the PP, 92nd in xGF/60, 22nd pp/60, 74th in goals/60 (Olofsson is 5th).
Eichel will be 25 next season, how much upside is left? He has a serious neck injury and wants experimental surgery. He plays with Reinhart, Skinner and Olofsson, he's not going to get a huge boost on most teams (he'd have to be the 1C to play with better talent, think JVR and TK/Voracek would be a huge upgrade?).
If he was a Couts, Barkov, Bergeron type defender, he'd be worth pursuing. But he's not. Has never gotten a single Selke vote.