Taking out the "bomb" effect of abilities would not be a good idea, at least by my book anyway.
I dont know how it is on Normal, but for the higher ones at least, most abilities would become completely unusable without that effect. Or, I guess I should say, completely suicidal.
Very specific abilities perhaps... "operation" types only, probably... would still work, because you could head past the outer edges of the battlefield, and THEN use it, and then dive back in.... but everything else wouldnt be at all viable.