#1 Without any need to persuade people now, there is no need for the personality attribute.
#2 Luck had effects on everything. Which is too vast to care about, I mean not alot of people would waste their time raising it.
#3 Speed is probably going to be judged by what body type you choose.
#4 They are probably going to make these attributes into perks in the perk trees.
I am "not buying" his explanation.
#1 We don't know whether there is no need to persuade people, just that there is no minigame. Also, removing a feature that was influenced by another removed feature (personality) is not really a good solution, is it? That's like removing health because you won't be able to take damage anymore.
#2 Yes, luck affected everything. In the new system, I wont' have the option to chose something that affects everything. Even if you didn't care about luck, why remove something instead of fixing it?
#3 That's an interesting assumption, but we (sadly) have no indication for that. Besides, they would have to balance that as well. If I chose an agile body, would I be weaker with melee weapons? What's the downside for mages?
#4 All perks are tied to skills. Where would you put perks that affect your running speed and jumping capabilites, with athletics and acrobatics gone?