it essentially sounds like "let us choose if we want our own wyvern pet or not so everyone will be happy". the same as "let us turn off agro meters"

it not only sounds generic imo, but you also have to remember that balancing isnt an easy issue and not done over night. having a system for one class and one class only that allows its stats to bounce back and forth according to whether or not that person chooses to have a wyvern at that time would be an annoying and arduous feat.... especially for only one class.
im sure other classes would like the special treatment one way or another as well.

this please all mentality does not work very well.