Morde will never be played in place of a marksman
I know you want to make champions that can fill niche roles, and normally I'd enjoy these changes if there wasn't one depressing fact about the game: No one, NO ONE will want anything other than a marksman in the place of a marksman, and he will be played in the spot of a marksman, if he has no CC he will be played that way. The thing is (especially in ranked) people love the meta, live and die by it; and when you threaten that precious meta, people get mad, report you to oblivion mad. I know you want to turn this guy from a toxic midlanner to a big BFF bot lane guy, but as long as this meta exists, people will only play the things in that meta. Morde will only be seen as a troll pick if these changes go through, and judging by how people are looking at these planned changes, I'm not alone on this. No matter what you say to the community about how much you want these changes to go through, all anyone will hear is: "Morde is troll pick now, do not play."