Morde nerfs are too much
Why do you have to gut him, rather than take the nerfs slowly, 1 step at a time? There are champs who sit at 53% win rate all year and aren't touched(ahri for example), but Morde gets completely fucked 1 patch after his release?
Passive nerfs and 10% pen off his e is huge and will make him fall off as soon as the enemy buys MR... after these nerfs Morde is legitimately going to be weaker than pre-rework morde and is straight up going to be a worse Darius(who gets a built in 35% apen + has black cleaver, and AP has no equivalent.) Qss will now not only remove your R key, but will make you be stonewalled as well while you're draintanked by adcs.
Honestly, why even rework champs if you're just going to gut them into unplayability outside of iron elo 1 patch after their release? He already has lower armor and movement speed than nearly every juggernaut, and has no way to sustain in fight, there will be no real reason to pick him after these nerfs.
Might as well revert Morde if you insist on him being a dogshit tier champ, because at least his old kit was fun and unique.