Now that there are no more co-owns, the chances we loan him out and he becomes a starter in some Serie A team are lower.
most co-owns are player exchanges half-for-half. when Genoa bought half of Immobile they didn't pay any cash, they exchanged with half of Boakye, where is the risk for Genoa is buying half of Immobile for half of Boakye?
Juve's co-owns: Marrone, Triosi, Pasquato, Gabbiadini, Sorensen aren't starters because of co-own, there is also Schiavone, Beltrame, Spinazzola, Gouano, Magnusson co-owned with Serie B clubs who aren't starters, on the otherhand Leali and Appelt aren't co-owned but are starters. other examples, Bardi was a starter for Livorno without any ownership for Livorno; Immobile and Insigne started for Pescara without any ownership for Pescara because they were good.
my opinion, co-owns just make player easy to transfer, it has little to do with whether players will start or not, which almost entirely depend on the players' performances in training and matches with the players' new clubs.