Why haven't they?

[Arikel]

Whoa is the nightwasp really going to stay?
i enjoyed playing uncloaked weasel so much... damn!!

[Melo]

The nightwasp will most probably stay but will be subject to changes in order to make the game more equilibrate so there wont be 50 nightwasps in every arena which is the case presently (but that must be only due to curiosity).

[Superted]

I've heard it'll be a weekend thing...like pure basing used to be.