I would somewhat disagree, I'd say we have 2 OF right now that are good quality: Casty & Marsh.
Rojas is not an automatic out anymore, but still is pretty weak. We can carry him because his D is so outstanding, but it is hard to hide him in the lineup as we learned last year in the playoffs.
Merrifield & Pache are not the answers as I think we agree on. Both are weak bats and Merrifield is also an iffy defensive player.
Schwarber would not be a good option in LF either as we've seen first hand. Harper does not appear able or willing to return to RF.
I think we need a 3rd quality OF; capable defensively and someone who can hit at least decently and is not a liability to play. If that is a CF to replace Rojas, that works for me or a better corner OF - either in platoon with Marsh/Casty or as the starter and Marsh/Casty become a good bench bat.
I do not have any sacred cows and the Phillies should not either. The only question that should matter is does it make the team better. I think limiting the search to a 4th OF misses the point and dooms us to watching the same guys flail at pitches during critical ABs in the playoffs again. If they decide to do nothing, they must have slept through pivotal playoff games the last two postseasons.
We agree on the reliever for the pen.
Right now, Hoffman, Strahm & Alvarado are the top 3 performers. Kerkering has been solid and is close to being in that group IMO. SA & Soto have been inconsistent. The rest are a collection of long men since Rob does not trust them or mop up guys when we're way ahead or behind in games.
I think we need one more reliever that could be in Rob's circle of trust and can throw more than 1 inning per outing. I agree with andyb, I do not want to sell the farm for Miller.
I'm not sure getting another starter is feasible, but do have depth concerns based on how guys ran out of gas in the playoffs and using Turnbull or Walker to start in the playoffs.
Sanchez has greatly improved this season and I would trust him for that extra start if we go with the big 3 (Wheeler, Suarez, Nola) overall. I do not trust Turnbull or Walker.