I'm a little it confused by the wording of your post, and while I didn't watch the stream, I will reply as best I can....

1) If you mean 5 new skills and traits for each existing class, then I sincerely doubt that is going to happen. You would be unlocking a trait or skill every level, which is not how things are done in game. If it was, then you'd have 25 base skills and 25 base traits for each class as is. I suspect it'll be closer to 2-3 traits and 2-3 skills per class if that many....

2) From what I understand from past discussion on the matter, there is no plan to change the way the hotbars work. One of the ideas behind adding new abilities to the game is that people will have to choose which skills, items, and general abilities they have on their hotbars more carefully, rather than simply having everything at easy access as it currently is. That being said, there's also no need for a new hotbar system, since you already have eight separate ones to choose from that you can easily switch to and from, particularly if you're on the PS4/PS3 (which given that you said cross bar makes me believe you are), as you simply have to hold one button and press another to instantly switch between all your hot bars, or simply press said button repeatedly to cycle through them if you're playing as anything outside of the Arcanist family.....