Everything else you said is spot-on except for this imo
Fake out is definitely a big deal for this set because it let's you counterlead Hsamu with fake out to break sash+kill with CC. Outside of that, it's generally not awful speed control, and it increases ur chances of applying poison. If I was to lead with this sneasler (shocker, I know) and my opponent leads zapdos (another shocker), I have fake out+u-turn=2 chances for poison touch to proc rather than just 1 chance (I u-turn immediately). Given that half the fun of this set is abusing poison touch, fake out is definitely a good choice on paper and in practice.
I will say, this set is not splashable. It wants pivots to get it in, it wants hazards to synergize with the volturn, and it wants the correct wallbreaker to abuse the mons that it is bringing in. But on the right teams it is a really strong set.