Void Mage?

As the title suggests, Id like the communities input on an idea that I had after I took my morning bng rip… With Midnight coming, devs could tinker with arcane mages to where they only cast spells that have to do with stars (Similar to boomkin) and create a new “Void” mage spec. This spec would cast space like void spells like Void Beam (Instead of moon, star, or sun beam). Cast some sort of AoE black hole that deals damage for m+… Void bomb like warlocks from Destiny? Also think Malzahar from league of legends? We could give them void minions? Or not to avoid making them to close to warlocks… Im thinking lots of spells that have to do with gravity and more dark spacey stuff… Not quite a shadow priest as that has a more earthly and terrestrial feel to it… What do yall think? Is this a great idea? A terrible one? Orrrrr is my head in the right place and some of the ideas can be reworked? How cool would an ethereal void mage be???

I was hoping for something different that is mage based. Familiars, have a element or magic based familiar where you cast spells at it and it dismantles your enemies. A new way to beat on enemies.

Step 1: Replace Shadow Priest with a holy DPS caster.

Step 2: Add a Witch class that has the original Shadow priest (Now in extra void flavor), as well as Witch Doctor for healing and Necromancer for pet based DPS.