I know people are worried given his performances last season, but there are a million possible reasons for that, not least, the fact that no one performed in that team last season.
I would take Cucu back at Brighton in a heartbeat he was fantastic, he played well both defensively and offensively, at LB, LWB and LCB. There was a good reason he was our player of the season and that Pep wanted him as well. His season before that at Getafe was also strong and I was gutted when he left us, luckily we signed Estupinan who is also excellent.
Getting him on loan is a low risk strategy for both United and Chelsea, for United he's short term and will be desperate to reignite his career away from Stamford Bridge and for Chelsea he's off the books and if he plays well it secures his worth for next summer.
He is an excellent player.