Detroit did well but so did LA. Hope is a great prospect, ranked #25 by MLB pipeline. But The Dodgers still have 3 OF prospects ranked even higher somehow. So to them, he was expendable.
I kinda think the lockout makes Dodgers' hopes of signing Skubal higher. It's almost certain that if a salary cap happens, all existing contracts will be guaranteed and teams starting out above the cap will be phased in over multiple years. So by a certain logic it makes sense to get all these deals in before the lockout. You lock in a competitive edge for a certain number of years and guarantee opponents can't just increase spending to catch up with you.
Meanwhile teams that are likely to start out below the cap have every incentive not to take on long term commitments before the exact parameters of the cap situation are known.