Chelsea U21 coach Dermot Drummy says their loanees were successful last season.
Drummy told chelseafc.com "Piazon's loan to Malaga has been successful, Chalobah's to Watford has been successful, Toddy Kane has had a successful loan at Blackburn but at Preston before that he wasn't very successful, and others have gone out and would probably have stayed had we had a higher calibre team in the Under-21 League.
"So we will review that, along with [Academy manager] Neil Bath, because we want to create a stronger environment to get our players ready for the next level, otherwise they are always going to see a loan move as best.
"The changes did make the league more competitive at the beginning but sometimes when the boys go on loan and you bring younger players in to learn, it suggests we are not going for the league, it suggests players going on personal development journeys. We have to look at when we let players go on loan.