I like the concept, although I feel it should only be able to target your own permanents and creatures. PC and CC in one card, and this cheap just seems way to strong.
I originally designed the card to be PC, and I'm adamant about giving other elements cheap PC. Consequently, I would never take that part of the card away.
Now, it is true that I did not take the versatility of this card into account when I made the cost, but I can't say that it's cheap for its individual uses.
For permanent control, for example, it costs 1 more quanta than Deflagration/Explosion. In addition, it gives the opponent some pillars. In the case of the upped version, it gives the opponent towers, which means that the opponent also gains 1-3 extra quanta of that element the very next turn. I really don't want to increase the cost to the cost of Steal; after all, it does just as much as Deflagration/Explosion and more: it helps the opponent, too.
Creature control is a bit harder to defend because it is an insta-kill card. However, only a deck with no more than 6 creatures susceptible to CC would be destroyed. However, a deck with, say, 12 creatures would be able to spit out more creatures faster because of the extra pillars. You may try to kill that crimson dragon in the pillarless destroyer rush, but all you end up doing is give the 4 extra
to play another destroyer. Would insta-killing creature really have been better than congealing it for 4 turns, or delaying it for 6 turns?