I doubt Moreno would have gone.
As for monitoring his progress, I know we have "buy back" options on Ibe and Smith, but how often are such clauses activated? Morata and Real I can recall, but other than that I'm struggling.
Carvajal (from Bayer Leverkusen to Real Madrid) & Denis Suarez (from Villareall to Barcelona) are the ones i can think of