Why A Spell?

As you all know I play a bunch of Hearthstone. Probably more than I should, but hey it is a great thing to do when you are just sitting around. For awhile now something has bugged me. When you go second in Hearthstone you get "The Coin" now". Now I am not arguing weather or not going second someone should get something. They obviously should and "The Coin" is great at trying to balance the case for going second. Why a spell though?

The reason for it being a spell really doesn't make sense. Why? Well it being a spell favours certain classes and cards more than others. It being a spell allows for in some cases an advantage when what it should only be is something to make you even. 

If it was not a spell it would still do everything it is needed to do without doing the the extra things it can be used for. Sure there is also the case that it cannot be discovered or casted by Yogg, but neither can toxin or spare part cards or other things like that. These types of "spells" cannot be put into a deck on their own so it makes sense,

Now I don't changing it to a non spell would make much of a difference in the long run in most cases because really there are only a handful of situations this effects, but it is something that has bothered me for awhile. Maybe when they chose to make it a spell it was for balance, but then with the types of cards they have added over the years things can change.

I just believe it is something to look at, don't you?