I've just plowed through ten pages of replies and found that many people don't know the game they are playing.
Example 1, in Vancian, you don't forget your spells. You prepare your spells in the morning, you don't relearn them every morning.
Example 2, The existing power point system for psionics is very unbalanced and leads to being able to crank out more high level powers than wizards can.
Now, as for the interview comments, I posted last year a list of about 15 things that I'd like to see changed in Pathfinder and I've since learned that every single one of them is going to be incorporated in 5. So, I'm very happy with what I'm hearing.
I don't expect that every pre-existing class will have its own class write up in 5, nor do I want it to. I can easily see the Assassin being a variant of the Bard, for example - potentially a less social and more combat heavy version of the Bard (with a nod towards Dark Sun). I can, also, see the Warlock and the Sorcerer being brought together (maybe with the Druid thrown in there as well). This particularly because of wild talents which suggest that every character of every class has the potential to have a strange bloodline (which steals the Sorcerer's traditional sucktastic flavor) on top of which the Sor is Cha-based and the game designers want to clean the mess of what attributes represent. I see the Warlock, Sorcerer, and Druid being brought together as Cha-based full casters with slightly different themes (infernal, extraplanar, and fey respectively) - making pacts with supernatural beings for power. I can see the Warlord and the Fighter being brought together. So, the number of actual classes will be small, but the ability to build every single class that has pre-existed will be huge and rich.
As for trading damage for other powers, trading your dps for something else doesn't make you a weaker character necessarily. Adventurers needs many abilities to complete an adventure, not just dps. Having the right other power makes you more powerful even at the cost of reduced dps.