The livers are going to have a tendency to break down and leave little particles everywhere which entirely changes the texture. A very different mouth feel throughout.
Go halfway until your sure you want livers and try it with hearts. Half the mineraliness, wont break down, and still has that meat texture that one might get with chicken meat or pork.
Unless youre sure they are fresh, make sure to trim the top far enough down to get the fat off as that freezer burns easily. Split them long before frying them up. I would probably do them first and readd them with little to no stirring as that is going to alter the appearance and diminish the visual appeal.
good ideas!