This is the reason OPS+ exists, after all. Turner was third on the team at 124, making him 24% better than the average hitter, and that's also what he did in 2021 (last year he was 110). He is still a Top 20 hitter in MLB by OPS+ and WRC+ (and as BKox noted even by raw OPS he was 28th). Harper and Schwarber are both Top 10 in all categories.
Doesn't mean he isn't overpaid (and the fielding remains a surprise/disappointment, at least to me). This is just the problem that is built-in to buying at the top of the free agent market, and with the injury and slump inevitability of older players.
To me all of the above also highlights why Castellanos is merely a very good hitter not a star, without even considering his defense (his 106 OPS+ was still lower than both Marsh and JT, obviously due to the poor early season).
They desperately need Bohm to be able to be around .800 next year, and for Stott to get back to his 2023 levels, but neither of them, nor Marsh, are ever going to be elite-level offensive producers. And obviously the system hasn't produced anyone else who is even close. But that's the organization Dombrowski inherited, and going all-in is the course he and Middleton chose, not incorrectly given what we've enjoyed for the last three years.
Saw Dombrowski said that the team does not need to go out and get another star, but also that he's not opposed to trading good players for good players.