I think Mama also “never called Santino Sonny, always Santino”

Vito and Michael would have planned the Baptism murders together though the individual assassins would have come up with their own murder plans

• Neri for Barzini

Barzini could have got away!
Barzini ran up, almost to the top of the steps and could have managed to run inside the building if Neri's first shot with his pistol, had missed Barzini

• Clemenza for Strachi

Clemenza seemed spent! climbing up five flights of stairs
It seems Clemenza fired only twice into the elevator with his rifle so perhaps the elevator operator was spared if he did not die of fright

• Rocco for Tattaglia

Why the overkill for the elderly Tattaglia and his working girl, in bed
Two assassins with machine guns perhaps a throw back to Sonny's killing

• Cicci for Cuneo

What if Cuneo was not the last person exiting
It seems Cicci fired four times compared to Neri killing Barzini's bodyguard and the driver, with single shots

• ? for Greene

Where was Greene's bodyguard? There was enough time as the killer politely! waited until Greene puts on his spectacles

masseur also spared but not working girl

He didn't check Barzini was dead Vito survived five shots

Working girls were used, abused and treated like they never existed, their lives worthless
I think in the novel only Tattaglia was killed and there were no machine guns

Do you know who I am? I'm Moe Greene! is invulnerable

Driver had hands up in surrender Three not two single shots

It looks like the elevator operator quickly moved into the corner, out of Clemenza's firing range
Obviously that building Strachi was killed in, must be frequented by the mob!

That whole scene was filmed for dramatic effects, not for logic:
--Two gunmen armed with submachineguns to kill Tattaglia and the hooker he was in bed with?
--Neri takes out Barzini and company with a single .38 revolver?
--Fat Clemenza climbs all those stairs to intercept an elevator car? In that confined space, none of the three (including the operator) would have survived two shotgun blasts.

No doubt Turnbull dramatic effects, not for logic: like all the Dons and Greene were out and about at the same time, for the Corleones to synchronize their murders
If logical, what would we have to debate, half a century on!

like all the Dons and Greene were murdered leaving Don Michael Corleone only one

Want to know how many men he had killed with Carlo? Read the papers -- read the papers!

As regards "dramatic effects" Directorial licence, no logic – Nothing beats!
1. the abortion
2. Michael telling Fredo “Hyman Roth will never see the New Year”

3. Timelines

What was Vito's plans for Michael, on his return home?

Was he always going to get him to settle all Family business before embarking on his legitimate future life

Though it never says it explicitly in the movie: Vito wanted Michael home so he could turn over the reins of the family to him, I believe it was MIchael's initiative, not Vito's, to settle all family business before the move to Nevada. In a deleted part of the garden conference between Michael and Vito, MIchael says, "What about Sonny? What about Sicily?" Vito admits "It was a sign of weakness" that he didn't attempt vengeance. I infer that it meant he was leaving that to Michael. In the novel, Michael warns Vito that if he attempts to dissuade him from going ahead with the Great Massacre, Michael would go his own way.

Sure thing Turnbull Vito was leaving - settling all Family business - to Michael after Vito died Thanks! Pop

Vito, always the Nice guy! won't make his daughter a widow So leaves his dirty work for Michael, to make his sister a widow
Vito never thought about all the turmoil – killing Carlo, Fredo stepped over – would cause Michael -- Vito never gave a damn....