I apologize for not clarifying in that post you quoted:
Lucid Dream is the "one size fits all" MP management tool replacement for Shroud of Saints, Luminous Aether, and maybe Aetherflow as well (I am unsure if SCH are keeping Aetherflow or if it will still recover MP). needless to say, healers are generally expected to be able to manage their mp without outside help. If SCH keeps Aetherflow as is, then Lucid Dream is an optional (and likely useless) ability for them freeing up a pick. WHM and AST absolutely need this... and SCH will too if they lose mp recovery via Aetherflow. SCH is already guaranteed losing mp recovery from Drain (which is becoming a caster dps role skill).