They couldn't burn it down even if they wanted to. The first guy you would want to trade is Wheeler, which can't be done at the moment, and he is a 10-and-5 so you'd also be limited return-wise to his preferred spot. Nola? Ha. Harper and Trea aren't going anywhere. Bohm has modest value. Casty gets you little to nothing. If you really went to tank you would trade Duran, Luzardo and Marsh.
But I also go back to my original question. Because any moves are still going to be executed by Dombrowski, Mattingly and Barber. They know how to spend money and win; it is less clear if they are any good at professional scouting (for trades of both major and minor leaguers), developing and drafting.
The Phillies have a ton of money and if you want change just for the sake of change they can just not bring back any of the FAs, and trade Bohm. They could certainly field a team that might lose next year if they do that. See how the kids do, sign cheaper FAs and have a retool type year that could go either way.
I would still run it back with Kyle and JT, but not sure how you improve one of RF or 3B without even more spending, even if you bring both Miller and Crawford up.