It's funny I have read this post and everyone wants a true tough PF, which I would love as well!
But and its a big but, I think Luke's game reminds me a lot of Kyle Singler from Duke which can work well for this team this season!
Think about it Both are 6 foot 8 both can hit the Mid range shoot, both can shoot around 35-40% from 3, both are good foul shooters, and both are not great rebounders and not great defender.
Now I am not saying Kyle Singler from his Junior year. Yes that was the Year he helped lead that team to a title, but I am saying Kyle from his FR. and SO. years...... look at his numbers:
Year Team GP GS MPG FG% 3P% FT% RPG APG BPG PPG
2007–08 Duke 34 34 28.6
.457 .340 .774 5.8 1.4 .7 13.3
2008–09 Duke 37 36 32.2 .441 .383 .713
7.7 2.4 1.0 16.5
So when you consider were going to play Golden State/That teams type offense at times this season, that is why I think Luke will be a starter and a solid starter at that avg: 13 - 15 points a game 6 - 8 rebounds a game, and playing a role like Kyle did for that team! This will be very different for a PF at UNC but the role will still help us win a lot of games this season.
I just think a lot of us fans were spoiled with the likes of Hansbrough, Zeller, Henson, McAdoo, Johnson, Hicks, Bradley, Micks at the 4 and 5 for so many years and I think we can't compare Luke game to them.
But if you compare Luke game and role this season to Singler's game and role for Duke in 08 and 09 you can see how Luke can help UNC win a lot of games.
I don't know just my 2 cents!