On the corp side:
TWIY should be at least 15, but I understand why they printed it at 12 with the mets at the time, but it is effectively blanked by SYNC.
NEXT Design would be perfectly reasonable if it had 15, still nobody would play it. A reasonable change would be that you could draw a starting hand of 8, then install 3 ice, without drawing up. Even with that buff and the 15 inf, I doubt it would see much competitive play.
Nisei Division should have 18, so you actually have the inf to import good ice if you want to go glacier, which is hard to do atm. You could also import the third Scorched (or Jackson if you are punitive-ing) and some other fun tools)
Custom Biotics should say you can't put Weyland cards in, but for theme reasons that's not reasonable.
ETF should have 1 less inf, it's just too good.
Weylands ID's are fine.
For the runner:
@x3r0h0ur is completely correct, Exile should be at a high value, probably 20.
Another shaper that needs a buff is Nasir, he wants 16 (a little bias on this one)
Kit is fine, people just are not aggressive enough in their card choices. Kate should have 1 less, just a little hit like ETF.
Ian definatly needs the full 15, although it's a powerful ability, a good Corp player will play around him. It's too easy to know what he is doing with limited inf.
Geist needs 17, I always feel like I'm a couple influance from making a good deck, maybe a 50/19?
Anarchs are fine atm, maybe Quetzal should have a couple more, but Noise should be a 45/12 for sure. I know all the Noise diehards are going to come at me for this, but he just makes so many slow stratagies fall on thier face.
But for the most part, FFG has done a good job at balancing ID's.