I stand corrected - it is an illogical and imbalanced rule, which was later clarified to further perpetuate the lack of logic
Gee, I didn't realize that you hated HARP that much...
If you have a mage facing off with an archer - the archer fires his bow and the mage uses deflection. The mage casts a fireball and the archer sudden dodges... Next round the archer can do nothing while the mage casts another spell.... bye bye archer!
You are forgetting that the character is still considered to be performing the Sudden Dodge the next round, which means that he still gets that bonus to his DB as well, the same bonus he got against the spell attack.
You are also forgetting that players are supposed to declare actions before rolling for init.
This means that if the mage did not know about the missile attack before the round began, he would already be casting his other spell, and thus would have to cancel that to cast the instantaneous spell.
but the result is an imbalance between spellcasters and non-spellcasters.
Spell casters, in ICE games, have always had an advantage over non-casters, simply because they have magic (this actually can apply to most any game). HARP reduces that a lot from the imbalances in RM, but nobody has ever tried to claim that HARP is perfect.
However, getting upset and attacking HARP just because you disagree with one small part, a part that almost nobody has ever complained about before seems, to be a bit much to me.