Answer me this
Will you ever really attack someone with 4k hp who is healing for 1k every like 2 seconds?
No. I will ignore him, focus the people on his team who are actual threats because they do damage, kill them, then
A) If I'm alone, just leave because Mordekaiser can't chase me and can't do anything to stop me
B) If I'm with my team, focus kill him and proceed to the next objective.
Your math proves I'm right...
What my math shows is that, to match a full damage Mordekaiser for shield generation, you're going to have to build a LOT of health.
While you are building this health, you are overall building less and less damage. This means that the enemy has less and less reason to bother trying to fight you in the first place - you cannot peel, you cannot chase, and you do no damage.
This is an insanely good direction for Mordekaiser
He is creating the ultimate worst scenario for opponents
Option 1 - Ignore Mordekaiser complete... Mordekaiser kills your squishies
Option 2 - Focus Mordekaiser, Well he was insanely hard to kill and you just wasted a lot of resources on a guy with mediocre damage and no CC
Option 3 - Disengage for life
Your scenario needs some editing because it's going to play out more like this:
Option 0 - Ignore Mordekaiser because he's hard to kill, but since he has mediocre damage and no CC, he cannot kill your squishies nor catch them; proceed to wipe out all of Mordekaiser's teammates while he saunters along futilly because he only has tank items and does no damage. Finally swarm and kill mordekaiser because he does no damage and can't escape. Win the game.
How do I know this is how it will play out? Because when I try to build Mordekaiser as a bruiser, this is what happens to me, as he is, RIGHT NOW. He has the 3.5 d&d fighter problem: it doesn't matter how tanky you are, if you can't prevent your opponents from getting to your controllers and strikers, the monsters are going to ignore you and kill your teammates. The only way to get enemies to attack you, or contribute in a meaningful way is to build for TONS OF DAMAGE.
They did what they said they would, reduced burst increased DPS
Mace of Spades with 500 AP went from doing 400 damage to 330, but with lower cooldown the DPS went from 100 to 110
With that same AP, the ratio reduction on Siphon reduces the damage by 50, or 8.3 DPS reduction. So overall it is still 1.7 DPS increase
Ok... let's talk about this for a second.
First, what you're failing to account for is that you're not going to have 500 AP because you now have to build health tank items. You're going to have maybe 200ish ap - which means, coupled with your lower base damage, and lower scalings, your DPS is not going up at all, its going down, MASSIVELY.
Second, Mace of Spades is probably his least useful ability - why? Because in order to apply it, he has to melee his opponent, but he has no way to close the gap, and no way to cc the enemy to force them to fight him. I honesly say I get much more use out of Siphon of Destruction, using it to poke the enemy team while we're waiting for engagement and generating massive shields, than I do from Mace of Spades.
THIS IS IGNORING THE FACT THAT 'W' CAN NOW BE CAST ON 2 PEOPLE!!
Not only does that increase his DPS by like another 100, but it also vastly increases his team utility!
I'll admit this is an interesting change - It will make W more useful in lane certainly against pokers, as you can W a minion, and still have a shield on yourself. It doesn't change his team utility much though - because the scenario was, if I was in front I W'd myself to tank the damage, and if I was lagging behind I W'd the bruiser in front so he could tank more damage.
This new Mordekaiser is insane, and I will definitely begin playing Tankaiser
You are correct, this is an insane direction to take the new Mordekaiser. I can only hope they come to their senses.