If you're losing both Eovaldi/Wacha, and you don't think Sale can stay healthy to stay in the roation or shouldn't what is the rotation next year???
Pivetta
Paxton
Bello
Winckowski
Crawford
You mine as well raise up the white flags now. Do we even know Paxton can stay healthy? I have zero confidence in Crawford/Winkowski being MLB starters, they just aren't that good. I think Crawford can be a swingman. I think Bello could be good, but is he going to be good in 2023? or is he going to struggle for a year or two before he's an established MLB starter? That rotation could EASILY be disastrous.
That rotation doesn't need one guy, or even two guys, but three guys added to it at least. Even if Sale is healthy you still need a few guys, If you're signing a Rodon/Scherzer/Verlander/Degrome all those guys are going to cost a lot more than a QO and come with multiple years, especially the younger of the bunch. So if money is the concern it's going to cost even a lot more to fix the rotation outside of a QO.
There is of course the trade market, but if you're buying two to three starters there you are effectively selling off your entire farm.