Killing that Passport felt real nice ^_^
Personally if I play Nero I'm going to play 3x Faerie and 3x Crescentus to start. Don't rez your sentry? Fine with me. Rez it? Okay I'll derez it. Rez it again? Okay I'll jack out and go elsewhere.
With Corps slotting more and more sentries, Nero could be okay. I personally enjoy playing very aggressively and face-checking everything. This has become less and less viable as we have seen more threatening face-checks in recent releases. Nero may take me back to the days where my first turn always consists of face-checking HQ and RND, clicks 1 and 2. And I'm okay with that.
How does he help you win? IDK. I'm generally loath to use the term tempo, as I don't claim to fully understand it. I think it has something to do with the efficiency of your plays versus your opponent's. Nero may be a reasonable tempo ID. As I see it, the sentries that are played are meant to be tempo hits for the Runner. A full value Assassin wipes 3 cards and a program, which costed credits to install. An Architect gives click-less installs for the Corp, potentially recurring cards the Runner spent credits and clicks to trash. Ichi 1.0 is either going to tax a whole mess of clicks, or completely obliterate a rig that the Runner invested credits into. Is my understanding of tempo flawed?
If my understanding of sentries and tempo is sound, Nero may drastically reduce the efficiency of all but the cheapest sentries. Cortex Lock is only 2c; not a huge loss. Once you get to 4c and beyond, though, Nero's ability may impact Corp play in ways we can't fully anticipate yet.