People complaining about Maw have no understanding of cost efficiency
Let's start with the age old
vs 
500g combine cost, 1300g total. 102% efficient, except during the 5 second active during which it is 135% efficient at level 6, or 141% at level 9, with a 90 second cooldown
165g combine cost, 1200g total. 102% efficient after 12 CS, stacking up to 138% efficiency if farmed for a total of 2.5 minutes. No cooldown.
It should be fairly obvious which one is more generally effective. But now you're going to say "But Charles,
rushed it and killed me at 6???" That's because Zed is the 3rd best mid laner in the game, not because he bought an orange sword. Is
broken because
rushes it all the time? Hexdrinker is actually pretty shit on it's own, but Maw is an amazing item.
Now for
and
. Maw is actually better than Hourglass if you consider flat stats and passive efficiency (12% if you're curious, increased to ~52% during the active), but the items have two major differences. The first being that Hourglass's active isn't completely worthless against physical or magic damage, and stops everything.
The second difference is that Hourglass can win games on its own. Maw's shield doesn't suddenly stop Zed getting knocked back during an assassination attempt, or mitigate an entire 3500 damage burst combo, it gives a bunch of great stats and is generally useful. In exchange Hourglass is far easier to fuck up, because of how insanely powerful the active can be. And if you try to give me "WELL THEY JUST DOG PILE U DURING THE ACTIVE AND U DIE" then I'd really like to know how Maw is stopping 5 people from dog piling Zed or Talon instead.
One last thing for all the people on this board allergic to rushing
despite it being a meta item, here's how great that armor you want early game really is:
225 HP from Catalyst for 1200g, so let's say you somehow spend 1200g on pure armor, giving you 60 more
Ahri has 34 base armor and 830 base HP at level 6. Effective HP is calculated with HP x 1 + (Armor/100)
From base armor your effective HP has increased from 1112 to 1610
With only the HP from Catalyst, a little under half the item's value, your effective HP at 34 armor would be 1413. Not only that, but the health affects both physical and magic damage rather than just one