So what's left in the cupboard?
Guys you hate to trade, period: Bogaerts
Guys you hate to trade unless maybe (emphasis "maybe") they were pretty much all it took to get a proven controlled young SP like Harvey/Sale/Salazar/Carrasco: Betts, Moncada, Swihart
Guys you'd be willing to trade (maybe 2 of these, plus lesser prospects) but only for a Harvey/Carrasco/Sale level young controllable stud: Devers, Benintendi, Espinoza, JBJ, EdRo
Guys you might be willing to trade as part of a 2-3 player package for a very solid starter (e.g. Ross, Niese): Owens, Johnson, Vazquez
Good tradeable prospects for role players or to package with guys up the list for better players: Cecchini, Marrero, Kopech, Travis, Shaw
Lottery tickets: Trey Ball, Chavis, Dubon, Basabe
Your mileage may vary, of course...but the bottom line is depth remains and an important need (bullpen) was filled. I don't know the prospects well enough to say if the value was right in the Kimbrel trade...but I'm fine with the strategy.