1. Who implemented the new FOXDIE?
2. What's the pros and cons of the new FOXDIE?
3. So liquid actually had the same intention as solid snake and his friends?

1. the patriots, through drebin
2. pros: the new foxdie replaced the mutated foxdie in snake. so he won't be a walking biological weapon
cons: the new foxdie killed eva, ocelot and bigboss
3. i'll let the taikos here answer this..

The new foxdie killed naomi as well right?

destroy the patriots

but unlike the "good guys",who wanted to restore order and stop the patriots from controlling others,liquid wanted chaos

I know she said she had cancer after the fight with vamp but if im not mistaken during snakes conversation with big boss about the new foxdie in him big boss says that naomi actually died because of his new foxdie if im not mistaken.

naomi died of cancer. after she injected herself, the nano machines in her body stopped controlling the cancer, since they have been holding the cancer for too long, as soon as the nanos stopped working, the cancer spread like crazy, who can blame them, suppressed for a long time.

as for snake, this is what i understand.

In MGS1, he was working FOR the Patriots. He didnt realize this. Liquid was working against the Patriots. and where does Ocelot sides? The Patriots.

In MGS2, Snake realized about the Patriots. So naturally, he was against it. Raiden was a puppet the Patriots sent to suppress the renegade Dead Cell. Since the Dead Cell was also a specs ops team under US Government, they too were infected with foxdie. This time, Ocelots was playing double agent again, Solidus was thinking Ocelot was under him, but as always, he was with the Patriots.

In MGS4, everybody is aware of the Patriots. And how they were fooled by Ocelot's Liquid gimmick. Actually, Snake and Ocelot were aiming for the same thing, but their method differs one another. Snake as usual, 'infiltrated' The Patriots from outside, while Ocelot from the inside. Without Ocelot's help and 'tough love' , Snake wouldn't have succeeded. if you noticed, he was doing what Zero was doing to Big Boss, placing Snake as the legend, like Zero placed Big Boss as his legend. each men hated their opposite with passion, but they have the utmost respect and honor for their enemies. Japanese.hihi!

my siggy, you wouldnt believe what I see in such 'exotic' restaurants here. As a human, I gave up on humanity after I saw the horror and I pray to God all the people involve die slowly, a painful and a horrible death by breast or testis cancer, amen.