This card as of yet not seeing much play is a relief, not a justification for it existing. This card should not have been made as far as I am concerned and the risk that it could one day see consistent play is an ever present menace until it is rotated. I hope it is always a sub optimal card.
It's still the start of the expansion. And like the start of every expansion, aggro is going to be very common. Glide is not good at all against aggro, so of course it's not being ran at the time being.
When the meta meta settles, is when Glide can be confirmed as being overhyped or not. If Control ends up finding a foothold in the meta.
So - I just played a game where glide was cast twice againt me. It is the most un-fun thing in the game (mabe apart from the new Priest legendary and being OTK'd).
Seriously - DH dumped his hand and I might as well not have bothered becuase there was not planning, no strategy, no fun. Oh look - those cards you were holding - nah - have some new ones. But not the same number you had, because, well that wouldn't be stupid as fuck...
It's a stupid card which will ruin the game (for me) if it becomes a staple in decks.