Good. You SHOULD have doubts. Why? Because all of the supposed harm that people keep claiming will happen is based on slippery-slope logical fallacies or conflating the problems of a multi-server, cross realm, instant-teleport system that uses automatic matchmaking, with that of a single-server, non-teleporting dynamic and a manual group-management tool.
99.9999999% of all the arguments against a group-management tool are based on unreasoning fear, bad logic, or misrepresentation.