[{quoted}](name=Ionian Vulpix,realm=NA,application-id=3ErqAdtq,discussion-id=y4YNAJyV,comment-id=0003,timestamp=2019-10-05T22:18:00.731+0000)
Toggle isn't the right word. A Toggle is something that changed and stay changed until toggled again. Something like Jayce or Nidalee switching forms or Urgot's W. Can be held indefinitely until the button is pressed to reactivate.
What you mean is that you should be able to Cancel the wall, which is what Taliyah has. It doesn't last indefinitely and it can't be cast all the time like a toggle. It can be cancelled, which completely destroys it and puts it on CD.
I don't know if Anivia's should be able to be cancelled because of how much more often it's up than Taliyah's and how NOT screwing it up is a skill check for the Anivia player.
I think making it removable is fine because most of those effects can't be reactivated for ~1 second. This means you can totally still mess it up, and that can totally get your adc killed, but you don't end up blocking off the jg path for the next 3 years to anyone without a dash (y'know, like anivia.)