I don't know that I would agree that the Color line of spells is critical to the viability of Enchanter as a class. I believe that the team are aware of a number of issues affecting the viability of Enchanters and that they are looking for solutions. At some point the class may get some help and at that time I would not necessarily expect the class to shine in the usual way, so I encourage you to keep an open mind towards tools that help the class in general but are not exactly the same as those that have been removed.