C: A full season of Danny Jansen who already put up a near .800 OPS last season.
LF: Billy McKinney crushed RHP in a small sample size last season, and he seems to be more competent than Teoscar defensively, so he should do pretty well next season if used correctly. Teoscar for all his faults defensively still put up a 107 wRC+ in his first full season which is impressive. He could take a step forward. Cavan Biggio and/or Brandon Drury could become factors here as well.
CF: Kevin Pillar does Kevin Pillar things and provides around 2 WAR and hacks his way to another underwhelming yet still not terrible ~85 wRC+. Beyond that, we also do have Anthony Alford, Dalton Pompey, and Jonathan Davis who are complete wildcards, but at the very least all 3 of them should be able to play a good defensive CF.
RF: Grichuk had a 134 wRC+ after his return from the DL last season. I don't think it's unreasonable to project him for a near 3 WAR season if he's healthy.
1B: Justin Smoak proved his breakout was real last season and puts up another 2-3 WAR season at 1B.
2B/SS: I'm lost on what to think about Lourdes Gurriel Jr., although players with his offensive profile have been successful in recent years (i.e. Rougned Odor, Javy Baez). I think he could put up a better season than Odor did in 2016, and he was worth 2.5 WAR that year. Galvis plays gold glove calibre defense at SS. Drury takes a step forward after a lost season (he's still only 26). Biggio and/or Bichette may come up if they're performing well.
3B: Vladdy should absolutely mash.
Pitching: We had historically bad pitching last season. The last time we as a staff had an ERA as bad as last year was 2003. Just by virtue of regression to the mean, we should be better. Stroman will be better. Sanchez will be better if he's healthy. Borucki has the ability to put up a 4.00 ERA, which would be perfectly reasonable for a #3 or #4. The upper minors starting depth we have, while not carrying any impactful superstar prospects, is mature and major league ready. The best course of action when it comes to arms is to stockpile as many as possible because history has shown us you never know who will break out at the major league level when it comes to pitchers. Sean Reid-Foley, Trent Thornton, Sam Gaviglio, Jacob Waguespack, David Paulino, T.J. Zeuch, Julian Merryweather, Thomas Pannone, Patrick Murphy, Hector Perez are all going to be in AA or above and ready to contribute in the rotation or in the bullpen.
Realistically, I have no problem predicting that we'll be one of the better offensive teams in the league next season. By wRC+, we were already a top 10 offensive team in the league last season. That's only going to get better with Vlad and a full season of Danny Jansen, as well as other guys taking a step forward. I think we're a Top 10 team in Runs Scored next season.
What I really question is the pitching and defense. A lot will have to go right for the pitching in order to compete.