User blog comment:Willbachbakal/(Item Concept) A New Kind of Crit/@comment-24385282-20150705203043/@comment-1330314-20150705205323

I don't think switching targets should remove crit marks, though that could change if the mechanic becomes too strong as a result. Marks are for each champion only, so two champions focusing the same target would crit independently of each other.

I feel the comparison is slightly skewed by the fact that you gave Malzahar two Voidlings to start with, whereas Katarina can lay down her combo instantly, but I agree that this is where crit could become a little intense. I feel this has more to do with Malz's own kit being all over the place than there being anything wrong with crit, though, and I'd try to make his kit more compact as a result.