I actually think immolation decks are fine. They are very, very easy to counter. Academy has a lot of units naturally immune. Stronghold has some magic resist/immune units. Any deck with any kind of mass dispel is an instant winner if timed properly against their immolations. Playing multiple immolations too early is also usually a terrible move since if the board is cleared, they all go poof, so having nothing out but a gargoyle holding them active is asking for it to be reaver. bridged, etc. I play an asalah immolation sometimes, and when it wins it's great, but when it loses, it loses hard. Basically the definition of a gimmick deck.
The only thing I feel needs to be removed from standard and/or the entire game are the completely retarded one turn kill decks that go off on like turn 4-5. Masfar can fucking die in a fire, when I'm matched against Masfar now, if they raise fortune on their first turn, I just concede and move on.