Okay. THANK YOU. Sorry about the allcaps, it's just we've been ignored for like 9 days now.
1. But does that thematically even work making Mordekaiser reliant on allies? Is it even fair on Mordekaiser mains to pull this shit at all? This is almost like, for us, taking away Lee Sin's skillshot and making it require an ally to cast.
Sure, it adds teamwork, but it takes away from one's own feeling of being skilled and puts it in the hands of others. Morde is just about helpless without ally assistance now, when before I was very much accustomed to Mordekaiser being one of the least team-independent champions in the game, along with the Tryndamere players and so on.
If my soloqueue allies fed in the botlane or the midlane, I would say "hueheu, I'm Mordekaiser, not to worry," and I could usually reliably duel most enemies one on one even if my allies never showed up. Now, I NEED my teammates to lock people down for my third Q hit, and help me catch people, and access my W ability. I rely on unreliable allies in soloqueue, frequently strangers who I have never met before.
My skill, game sense, and so on directly influenced my results. Now, they mean nothing to my results if I don't have someone to CC for me and get me to targets. Is that really acceptable, gimping a champion like that? Would you do that to Lee Sin or Zed mains?
2. Because overloaded isn't just about what spells are used for, it's also about the passives. Overloaded means that a champion does more than it says on the tin, has hidden power, which may not be apparent to enemies for example or which makes the champion have no weaknesses because it does too much.
Mordekaiser's new ultimate is overloaded: The ability. It heals, it does damage burst and over time, it steals AP, it steals HP, it gives you a champion ghost and takes their passive, AND ON TOP OF THAT gives you a dragon if you kill the dragon.
3 All I feel with the new Mordekaiser is that I get rewarded heavily if I have a good team, and punished hard if I don't. Mordekaiser's weaknesses and strengths were clear: He was a HP caster but had no innate sustain, was a strong lane bully but vulnerable to ganks, and he was a big threat as a fighter, but very immobile and lacked CC.
If I get a half-decent Thresh support, all those laning phase weaknesses are eliminated. My new W gives me and Thresh a free manaless heal, the changes to Q mean I now control my waveclear and am thus less vulnerable to ganks, and Thresh fixes my immobility and CC problems by peeling for me and bringing me along with lantern. And now on top of all that I get a Dragon ghost. NO EXPLOITABLE WEAKNESSES.
And as we've seen from CertainlyT's previous designs, a champion with no exploitable weaknesses is overpowered, is left OP by Riot for a month or so, then nerfed hard and forgotten. A champion with few exploitable weaknesses is called cancer by the playerbase, because cancer, too, has few exploitable weaknesses.
4. Well, thanks, but are you as a Riot employee going to say "yes, your point is valid" and then just let it kind of go?
In closing, Mordekaiser is currently a champion with clear strengths and weaknesses, a 50% winrate, a unique full playstyle and a 2% playrate, something every champ should be striving for. I feel if you guys want to change him, you should wait for a full Sion level rework, because CertainlyT's attempt is honestly just a dog's breakfast which is going to be horrible for the game upon release, a return to his previous mistakes. It will be fun for us Morde players for a short time, then awful in the long term. 
Thanks for your consideration and reply.