Ever heard of Demo green heal?? (since you try to show that you know what you are talking about, and everyone else is a noob - or just me - I use your same form).
So a demo should give away Green Heal and spec general to get Purge??
It's like to say: take class with lowest survivability in game and force it to nerf even more survivability in one way or another.
You still proof my point: you are thinking about CCs itself totally not considering classes behind CCs.
That's the best way to create unbalances.
If devs listen to these suggestions rushing too much, after people will be crying on forum about these unbalances..