I'll share with you what I know:
Duke will be as good as this year as they will be next. They will be loaded with upperclassmen and the 3 freshmen I saw in their defensive backfield during the ACCCG will be more than adequate replacements for the star CB that graduate. I think they have the best shot to win the Coastal next year, they still won't have to play FSU or Clemson in the regular season.
Clemson's new starting QB will probably be rsSR Cole Stoudt. I don't expect him to be as good as Boyd and likely star WR Sammy Watkins will enter the draft. Clemson will still be loaded at the receiver position and the system they play in will of course produce points. They will return a lot of starters on defense as well.
I think Boston College takes a step back. They will need to replace QB Chase Rettig, WR Alex Amidon and of course Andre Williams. Will also be breaking in 2 new starting LBers and 2 on the D-line. Their coach Steve Addazio was a former OL coach for the Florida Gators and is one of the best in the business, I think he fits well with BC's traditional smash mouth approach on offense and O-line development. They'll be a pain in the butt in the long run.
NC State can't be any worse than they were this year, but may only be marginally better next. They will have former Florida QB Jacoby Brissett who will be an upgrade to the 2 guys that were splitting time that they just had. They had a good D-line until injuries thinned them out a bit, this unit should be above average and the strength of their D.
Wake Forest will not have Michael Campanero or Nikita Whitlock, bout the only 2 guys they had worth a damn. They have not done a terrible job recruiting the last few years, so maybe their new HC Dave Clawson can get them turned around sooner than later, personally I think it will take a few years for them to get back to respectability.
This was supposed to be FSU's rebuilding year, I thought they would drop 2 games; to Clemson and some random blunder along the way. I never imagined a team with a new starting QB and more than half the staff replaced would recover so quickly. I'm expecting 3-4 guys to enter the NFL early, hopefully no more. Should be the 3-peat favorites to win the ACC and hopefully in contention to be a repeat national champions.
You guys know Louisville better than I. They did not look all that impressive this year even though they have 11 wins. They'll be good I am sure of even if Teddy goes off to the NFL as expected. I'm thinking they and SU will be playing for 3rd in the Atlantic division.
If you twist my arm for a 2014 preseason power ranking it would look something like this:
1 FSU
2 Clem
3 Duke
4 Miami
5 Louisville
This would be my 1st tier teams that I think will be a constant feature in the top 25. Miami could be top 15 depending how well Ryan Williams performs as their new QB. Duke Johnson is also key depending if he returns and if he comes back fully recovered.
6 VT
7 GT
8 SU
9 UNC
The 2nd tier will be a jumbled mess. Every year GT looks unstoppable on offense through the first 4 games, then they look human the rest of the way. I've learned to give VT the benefit of the doubt, they'll lose a bunch of starters on defense, but Bud Foster is probably the best DC in the business, he'll have them ready. UNC will be very good on offense next season, if they have even an average D they may even win the Coastal.
10 Pitt
11 UVA
12 NCSU
13 BC
If UVA is able to hang on to their 2 5-star recruits, they should be able to contribute right away. The problem with this team is that their current QB David Watford sucks. I don't know why they try to air it out so much when they have a solid running game. I lack confidence in the coaching staff to get the job done, at best they barely get bowl eligible. I think Paul Chryst is a good coach, but losing Aaron Donald will be a huge blow to that defense. 2 more years they ought to be a formidable 2nd tier team.
14 Wake
Probably the only team that will flat out suck.
Overall, I think the ACC will be improved from this year. The addition of Louisville and Duke taking their game to the next level provides a lot of depth to the conference. Other than Wake, I don't think anyone is going to be flat out embarrassing.