Can a Rioter tell me what the Tahm changes even trying to accomplish?

So the good points first.

1. You now have extra damage before level 6

2. You no longer need to waste putting points in his R

3. Your E shield no longer decays

4. Your E has a shorter cooldown

5. Ultimate transports you half a second faster

6. Ultimate indicator for enemies shows up half a second later

Now the bad.

1. You now do less damage after level 5

2. You now need to stack your passive in order to make the damage worthwhile

3. His passive now no longer works on minions

4. Because it needs to stack, if you eat an enemy champion then you'll lose all that damage because you'll have to reapply your stacks

5. Your W now no longer applies your passive

6. Your W now no longer applies the damage from your passive (that was previously on your ult)

7. Your E shields for less damage

8. Your E heals for less damage

9. Your E shield now lasts 3 seconds less

10. Ultimate channel duration lowered

What's even the point? It nerfs his E, his damage, and makes it so you don't need to waste time putting points in your R. If you want to turn him into a W bot then at least give him back the movespeed when eating an ally.