In ArcMap, when I merge two street segments, there is one created from it, and the two old segments go away. Pro is keeping the two old segments and adding a new merged feature in addition to the old ones. I have to go back into the data now to remove the old ones, which is an extra step. I realize that maybe not everyone would need the old features to go away, like I do, so it would be nice to have a toggle for "Keep/Remove" old features as well as the one for "Use Template."