I do think Everton will struggle to remain top 7. Clubs are improving albeit gradually like Aston Villa for example are buying young players and Lambert is going to develop them all together as a team. Everton's team is a lot older so you can see the direction of these two clubs in the next few years is heading only one way really.
Other clubs have money to burn too. So I think Everton will struggle for top 7. But it depends on how they start if they can get the momentum.
Out of the promoted teams I see Cardiff as being the strongest and Hull being the weakest. Palace will fight but I don't think they'll have the class to pull it off, but who knows.
Any three from Cardiff, Hull, Palace, Stoke, Norwich, Fulham and Sunderland can go down. If clubs start of badly like a Newcastle or a WBA then they might struggle. Southampton's team may not click and they could cause problems.