Oh trust me, I know.
I develop a lot of mods–which isn’t exactly the same but is similar–and it is very time consuming. Even something that seems simple can easily have dozens of hours sunk into it.
Management on the business side of things is the only reason I can see that they wouldn’t add a tank of some kind.
Even if it isn’t available on launch, I hope they add the ability to tank (whether as an evoker or another class) at a later date!