TWIY* came out in Future Proof, so this doesn't actually make sense. EDIT: I see what you mean now.
That +1 hand size lets you grail better than a lot of IDs, which means the runner has to be ready for anything when they try to stop your astrotrain.
The 40-card deck size lets you tinker with your agenda points: You need 18 or 19 instead of 20-21. This actually looks like a bit of a liability, because you have to do odd things to cram in breaking news (which is great to close out games).
If you're running the 2-point fast-advance suite then it's going to have to be something like 3 astro 3 beale 2 napd 2 breaking news.
The other thing that looks interesting is that it can run a 6x 3-pointer deck, which means a full load of 2 types of agendas. But that's silly because you cut astro and beale, lose your fast advance and NBN's 5/3s just aren't that exciting. Also you probably still want breaking news to close out the game.
You could use closed accounts and psychographics for your tag punishment and threaten punitives, but HB does it better. Also, the on-encounter triggers for NBN ice (particularly raven and tollbooth) want the runner to make lots of runs to get taxed. I don't see a 5/3 plan fitting into that.