(1) I
fear not: 6 mana is simply too much for an explosive aggro deck. Even if you were be able to cast it, you would probably not have enough life to cast anything. Instead, against a control deck, it would probably be countered on the spot, leading to an almost certain loss.
(2) I
fear it would find the same problem as in RDW.
(3) Well, in an ideal situation, you would have enough life and it would not be countered. If this was the case, it would be much better than
Experimental Frenzy. Otherwise, it's just worse imho.