It's hard to tell how the clubs coming down will do. Burnley regrouped quickly and went straight back up. Sheffield United nearly did it too. But Luton imploded.
I think Ipswich probably look best placed to challenge. Leicester look a mess, I don't know where they go next, I think they're in much worse nick than when they came down 2 years ago. Saints, hard to tell how they will do, the new coach is an unknown quantity in English football.
Wrexham and Birmingham I would expect to fare a lot better than the teams who went down. Charlton I'm not so sure.
Overall, I think the division is probably slightly harder next year, mainly because of the top two coming up and the cash behind them.