That was the original problem with Long before Burning Wish and Lion's Eye Diamond were restricted. Very few people played the deck, but in the end those that did did well enough that we ended up having to use Death Wish to go find our Yawgmoth's Will

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Yes this deck is difficult to play. It's not so difficult as Doomsday to play properly, but most players will shy away from this or any other storm combo deck because there are easier good decks in the format to play. Will that be enough to keep Grim Tutor off the Restricted List? Only time will tell - and there is still six months before it's legal in the first place.