Not that card balance should consider False Gods, but this will also make Fire Lance FG decks almost impossible. Six Fire Lances at 75 quanta is 144 damage, not enough to kill any FG. With Fahrenheit, you could add some FGs to that list, but none that use any form of healing - which was one of the primary reasons to use Fire Lances against FGs.
The funny thing is that this will NOT usually affect PvP battles - which begs the question of why did Zanz make this specific change! 144 damage is enough to kill a player unless he has used something to increase his maximum HP. The one other situation where the change will matter is in the event that the attacking player has hit the quanta cap and has less than five Bolts; this is rare enough to be a non-issue.
This is the first time I've called one of Zanz' decisions into question, and it's not the concept of the change, but the execution that I think is flawed. To affect PvP Fire Bolt battles to any real degree, the cap would have to be lower than 50; this of course clashes with Stone Skin, albeit not a hard clash but a soft one (in the event cap-raising cards are implemented).