Those are three wildly different options:
This is the least disruptive of the three. I would voice my opinion that it’s a bad idea, grumble about it, and get on with my life.
I would watch the forums burn and subs drop as tens (hundreds) of thousands of players are either forced to change factions or races against their will. Forcibly pull the rug out from under the single most played race in the game? Not a genius idea, terrible in fact. Me? I have one Belf I rolled as a DK that never made it past 58 so…other than the game going up in flames and being a monumentally bad idea it would not affect me personally.
And finally…
No one would need to worry about my opinions because I would unsub the day it was announced.