The overall spirit of the motion is not to grant speaking time to members, but rather to the parties. That was the purpose of the motion adopted by the committee in the past. The party can choose to split its time if it so wishes. Like the other parties, the Bloc can decide to split its time into two three-minute or three-and-a-half-minute chunks.
If we amend the question to allow all committee members to speak, then we will be altering the dynamics completely.