Definitely agreed, Disengage needs to be made a full action as is intended in 5e. The way it currently is devalues the rogue and, once it gets addeded, the monk class.
Don't forget every other melee classes... Especially those that could be called "tank".
You nearly don't even have to hold ennemies for them not to reach your ranged unit because your allies can easily disengage and flee.
