Revolver into Lich Bane?

Hextech Revolver has a very similar effect to Sheen, but it gives AP and the damage it deals is magic (like Lich Bane). Could we make Lich Bane into a Hextech item? There are pros and cons for this so I think it's worth the discussion at least:

Pros: Hextech Revolver is a better item for an all-in assassin like Twisted Fate or Fizz (who typically rush Lich Bane) to build early. It gives AP, the damage dealt is magic, and the long cooldown encourages interaction with Thunderlords and burst in general.

Changing Lich Bane from being a Spellblade item means it is less toxic on champions like Sona who abuse it to add a bunch of damage to a spell rotation that is not intended to have damage.

Hextech Revolver doesn't proc on turrets. Now that mages deal damage to towers based on AP and Magic penetration I don't think we need an AP Spellblade item.

Cons:

Some champions, Fizz in particular, enjoy the CDR that Lich Bane provides.

The recipe would need to be changed to add mana somewhere, unless we scrap the mana altogether.

Ziggs likes the bonus damage to turrets, but this is less of an issue with his new W.

To be clear: my suggestion is that we change Lich Bane's unique passive to be: Your next basic attack against a champion deals magic damage based on your level, +75% of your Ability Power, as bonus magic damage. 40 second CD, shared with other Hextech items.