FireLance
Legend
That actually seems to be the way they are proposing to do it. In the round after you get hit, you have a chance to fail to cast your next spell. If you go ahead and try anyway, you might waste your action, but you don't lose the spell if you fail. If you choose not to cast a spell, you can fall back on a cantrip.I really dislike the idea that casting a spell is dangerous. Fighters don't lose the ability to swing their sword if they are hit. And they are not limited by a finite amount of times they can swing it.
I would be for them losing the ability to cast this round but not losing the spell.
The implication for non-spellcasters is that you don't have to "interrupt" spellcasting any more. As long as you damage the spellcaster on your turn, he will have a chance of spell failure on his next turn.