The Xindi would be akin to a history of Pennsylvania which does not mention New York, until a later volume in which some colonists sneak over the wall around the state and bring it down, and negotiate a truce. So, yes, too big and too close.
Had they been in a Yonada-like ark passing through, i'd grant your argument. As for the Mirror universe argument, consider the interphase as a nexus between the original verse and reboot verse which spawns a third. Besides, a clean reboot is a much better idea than a mucky half-reboot, half-prequel. It completely avoids continuity issues.