Not so much an review as an observation. As I am researching possibilities for the upcoming ID Swap tournament, I took a long look at the assigned influence of every identity in the game. To date, 6 years after he was released in Honor and Profit, Ken remains the only non-mini faction (which are a different story due to their tiny cardpool and need to import) runner blessed with more than 15 influence. 17 to be exact. Meanwhile there are 5 corps who have that privilege (3 of which are NBN), while one even has 22. Near-Earth Hub, AgInfusion and Titan were/are competitive powerhouses, GameNET is very solid, while Harishchandra and Custom Biotics are considered garbage. That to me seems to indicate that an ID's influence is less important than its ability in determining power level. So why haven't there been more runner ID's with 17 influence, especially since Ken hasn't enjoyed a huge amount of success?
One theory is that corps inherently need to import more cards to optimize their strategies, be it kill, fast advance or a well-rounded ice suite. Meanwhile, runners can spend their influence more freely, as they tend to have most tools in-faction. Anarchs especially were notorious for this for a long time. Who can forget Hatebear, an archetype that spend 8 or even 12 influence on copies of Account Siphon. Even nowadays, 15 inf identities like Hoshiko and Val have everything they need in faction, allowing them to easily import a playset of Apocalypse or Bravado. Because of this, even lower tier anarchs like Null and Kim are not exactly weak, just worse than their competition. A 45/17 anarch would need to have a terrible effect to not be considered broken, and printing purposely bad identities is not something either FFG or Nisei aims to do.
Mind you, the same consideration could also apply to shapers and criminals, just less so at this point in time. I am not a game designer, but I do feel it might just be harder to balance a runner than a corp in terms of influence. That's why we might not see another 17 influence runner soon, or ever. I am curious to see the mechanic explored further though, and who knows what Nisei has in store.