https://m.reddit.com/r/heroesofthestorm/comments/56try9/ptr_artanis_stealth_bufferino/

So we are testing this internally, but it is not intended for this patch and will be reverted before next week (this is a big change to make prior to BlizzCon World Finals).

A change like this requires many accompanying changes (even slight reworks to talents, etc, but needs some art support as well) to be properly done. Although no promises can be made about this, we're trying our best to make this happen! We know you all are/have been excited at the prospect of this change.

Sorry for the pump fake everyone, but there's a lot of work left to do on this. Thank you in advance for your understanding!

Q 도중 E가 가능한 이번 PTR버전 알타는 계획중인 변화인건 맞지만 너무 큰 변화라서(특히 블리즈컨 대회때 너무 큰 변화가 있으면 안되니까) 일단은 적용 보류한다고 합니다. 원래 내부테스트 빌드에서 적용하던 건데 실수로 PTR에 적용된듯 합니다. 그래서 패치노트에 없었던거고...