Eovaldi has come back healthy, yes, but he's also been pedestrian or worse most times out. Now, that can be attributed to still getting the feeling back after invasive surgery and basically building up his arm strength and working on control, but it's enough of a concern that there is going to be a big microscope on him heading into spring training and the start of the season.
I don't think there's as an equal of a chance of Sale returning fine and dandy as there is of him continuing to decline. Sale's arm issues are nothing new and it could be that he just overdid it last year when he came back for good and his body still hadn't recovered by the time he had to ramp it up for the regular season. I've made a big deal about Cora's bad plan for the starters, so I won't beat that dead horse but it's worth mentioning that it may have had the biggest effect on Sale. Then there's the toe injury he had, which likely affected his pitching motion a little and may have led to the sped up exacerbation up of his arm issue over time. But it's not like he was consistently awful: he had some true gems sprinkled throughout the season, most notably his 17K game against the Rockies, but he also had outings where he got bombed, including by teams and players that were historically overmatched when they dug in against him. And then he went to go see THE TJ surgery doctor and was given a stay of execution before being completely shut down for the season. As I recall, it was not a definitive, "Yeah, he'll be fine," but more of, "There's nothing major going on now but we're going to keep an eye on things and reassess in a few months," which is hardly as comforting as a complete all clear. I would argue that the chances of Sale coming back perfectly healthy and among the best pitchers in baseball again are significantly lower than the chances that he is going to be diminished moving forward, with it being a minor miracle if he's even 80% of the pitcher he used to be for the next couple of seasons. I can only hope that those fears are unfounded but there is not a lot out there to make me or anyone else feel great about Chris Sale being the ace of the staff moving forward.
Price will likely be fine, though, but these issues have been more and more frequent with him as time has gone on and, generally speaking, people with chronic issues don't usually see them get better over time. Fingers crossed that he'll be good but only time will tell.
Calling the farm system, ranked among the worst in MLB, as vastly underrated is a bit of a canard, though, and I don't think it's going to be a big draw for someone unless the plan is to do what Houston has done and Kansas City, on a smaller scale, before them and just tank to get a bunch of high-ceiling prospects to build the foundation for a few years of contention once those prospects begin to come of age. If it's someone who is trying to make the team a contender as close to immediately as possible, it's likely about appealing as a kick in the shins.