Complex sentence: Instead of centralizing activities to specific persons in the organisation, MJAFT under Veliaj's guidance introduced an inclusive approach by delegating tasks to all the members of the team, which was perceived to be one of the key factors of the movement's success.
Split into simpler sentences: Instead of centralizing activities to specific people in the organization, MJAFT! (under Veliaj's guidance) introduced an inclusive approach by delegating tasks to all members of the team. This was perceived to be one of the key factors of the movement's success.