Dima Surmay
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Regarding the interruption of Opportunity Attack (OA), it's clear, but it's unclear when the opposite happens, i.e., when the OA should logically interrupt, but it doesn't.
For example, in this situation, the OA doesn't interrupt when the red unit ends its turn next to the blue hero, but the blue unit doesn't see this during the OA, whereas without the OA, it would see it and could attack. Does the blue unit have the right to say that this is an OA bug and demand that it be able to take its turn? If it has that right, then that's where the criteria are needed to determine in which situations it's possible and in which it's not.
For example, in this situation, the OA doesn't interrupt when the red unit ends its turn next to the blue hero, but the blue unit doesn't see this during the OA, whereas without the OA, it would see it and could attack. Does the blue unit have the right to say that this is an OA bug and demand that it be able to take its turn? If it has that right, then that's where the criteria are needed to determine in which situations it's possible and in which it's not.