The thing in the Jays favour is that Espinal is exactly the kind of player they don't need to sign to an extension to cover his arb years, since the numbers he will put up will not be the kind that wins massive arbitration awards.
10-15 HR per year + good defense, a solid starter who likely puts up 2-4 WAR while getting paid nothing close to his actual on field value. He's the surplus value darling we will need to offset Vlad, Bo and others.