The players who's performance at the MLB level actually seems to matter to us in the long-term, for better or worse:
Good
Gurriel - I didn't expect to be happy with him at the hallway point, but he's grading out as about an average defender in LF, and he's been an above-average hitter through almost 500 MLB PA. It might actually be a 2-3 win OF skill set.
Biggio - The skill set seems to be transferring well to the majors so far. Seems likely to be a good contributor who can play a bunch of different positions.
Thornton - He's a rookie who's on track to contribute about 2 wins over 30+ starts and 170 innings, and he's controllable for 5 more seasons. That's a legit asset, and one rotation spot we don't have to worry about going forward, even if the current Thornton is ideally only the 5th-best starter on a good team.
Stroman - He's done Stroman things and stayed healthy, so he's positioned himself as either a valuable trade chip, or a candidate for a long-term extension.
Giles - Same as Stroman.
Bad
Jansen - I'm not as down on him as a lot of other seem to be, because the defense has been good, and he's not going to keep hitting this poorly. So even with the disastrous offense, he looks like a MLB catcher going forward. Maybe this year means we need to find more of a platoon partner next year than a pure backup like Maile.
Vladdy - Not even a bit concerned about him in the long-term, but his 2019 has been mostly disappointing. We all thought he'd hit the ground running like Soto and Acuna, and that hasn't happened yet.
Grichuk - He's been awful. Probably the biggest disappointment this season given the 50M investment that was made in him.
Teoscar - Most of us thought he was bad coming into the season, and he's been bad. With him turning 27 next season, it's looking like long odds for him to turn into a player.
Tellez - He's a pure DH who hasn't shown that he can hit. This isn't a player teams keep around in the long term.
Drury - Sucks.
McKinney - He's 25 in August and hasn't displayed a single useful MLB tool.
Sanchez - Get this guy off my baseball team immediately.