EPL "fake injuries" to goalkeepers new rule

Objective is ending these "fake injuries" to goalkeepers and the time-outs that accompany them - example was the MU-Leeds game last November when Donnarumma feigned an injury late in the match to kill momentum.
The proposed rule is for me more or less, simple: if the referee calls for the medical staff to treat a goalkeeper, the coach has only 10 seconds to designate another player who will leave the field for one minute after play resumes. If no player is selected within 10 seconds, the captain must leave the field. However, if the injured goalkeeper is replaced, the team is not subject to this new sanction.