I’m currently making the most of playing DH before the nerfs.
IMO, its Umpire’s Grasp that needs to be nerfed. A 5 mana 6/5 Window Shopper getting a 5 mana 6/5 is mostly (see below) not OP. However, a 3 mana 6/5 Shopper getting a 3 mana 6/5 demon is OP. Window Shopper gives a double discount, multiplying any mana cheating from Umpire’s Grasp (or anything else).
So, I would say the mana discount on Umpire’s Grasp needs to go. TBH, a 3 mana 3/3 with deathrattle: draw a demon is probably good enough… assuming the deck has plenty of demons. But cutting it to 2 mana and 2/2 would probably be better.
I say Shopper’s effect is “mostly not OP”, but of course that depends on the available pool of demons, which means it does potentially “limit design space” by allowing high cost demons to be effectively mana cheated, albeit at smaller stats.
However, it seems obvious that Magtheridon Unleashed was designed with this card in mind, so its not “limiting design space” that much… MU is designed to be a high roll for Window Shopper. Remember that at the moment, there are 11 demons that can be discovered by WS, but we just lost 3 sets to rotation, and as more sets are released this year, the demon poll will be diluted.
Anyhoo… Demon Hunter has other ways to reduce mana costs, and Window Shopper will always get double value from any such reduction. I guess nerfing WS to 6 mana AND nerfing UG to a 1 mana discount would also be good.
So… I’m hoping they do nerf Window Shopper as well. I pulled a golden copy, so an (almost) free legendary would be very nice. Maybe nerf its stats to 5/5 if it stays at 5 mana, or buff it to 6/6 if it is nerfed to 6 mana
So:
Either: Nerf Umpire’s Grasp mana cheat by 2
Or: Nerf UG mana cheat by 1, and Window Shopper cost by 1.