Maybe it's about who's filling similar roles on the MLB roster, and how long of a leash those players have.
With Sabato, it's probably Bell. Bell very likely won't finish the year on the Twins for one reason or another, so that'll open a spot for a hitter like Sabato, who I imagine can't be worse than Bell at 1B defense. Sadly for Sabato, there's a good chance the Twins would promote Gabriel Gonzalez in the event of a Bell trade or release, given he's on the 40 already.
Regarding Fedko -- probably Kreidler? He's on the Twins roster for his defense and versatility, and since by some measures he was the worst hitter in MLB going into the year, his offense has to be called a pleasant surprise. If Kreidler's hitting reverts to the mean, and if Kyler stays hot, it seems arguably more likely than a Sabato promotion, given how badly the Twins need people on their roster who can play CF, especially after the the Outman DFA.
Last note -- I can't believe how bad the offense is in Wichita. Of course, they can't help that their three best hitters played well enough to get promoted to AAA, but it doesn't look like Amick or Rosario will be joining them anytime soon, barring injuries.
Obviously Wichita is going to get a significant influx of talent next year, but folks like Sabato and Fedko may very well get a chance to get another year older at AAA and be an opportunistic phone call away. If they can keep their offense sharp into next year -- and not fade out like recent previous AAA repeats Yunior Severino, Will Holland, and Jeferson Morales -- I'd have to think they'd at least give the new GM less reason to look outside the system at journeymen role players. They also have to stay healthy -- I have to think Holland would have earned his cup of coffee last year if he hadn't been injured and forced the organization to reckon with Jonah Bride and Ryan Fitzgerald when infield injuries on the MLB squad piled up.
Anyone here old enough to remember Bernardo Brito knows that it's possible. Stay healthy, stay good, you might get your shot.